In corn plants, normal height (h) is dominant over short height (h). Complete a hybrid (heterozygous) cross.
Answers
A mating experiment between two organisms that are equally hybrid for two traits is referred to as a dihybrid cross.
When two heterozygotes are crossed, the anticipated genotype ratio is 1 (homozygous dominant): 2 (heterozygous): 1. (homozygous recessive). When a phenotypic ratio of 2:1 is seen, a deadly allele is presumably present.
H - Height in inches
short height, h
Heterozygous for H
Heterozygotes would be involved in the cross Hh x Hh.
Hh x Hh
I pronounce: HH Hh Hh hh
Considering that H trumps h;
Both HH and Hh would produce normal-height phenotypes.
A short height will arise from the hh trait.
Thus;
3/4 or 75% of the time, a cross will result in a genotype with normal height.
25% or 1/4 of the time, the cross will result in a short height characteristic.
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Related Questions
Lake-effect snow occurs under which conditions? A. heavy snowfall in an area melts and forms a new lake B. water vapor is picked up over a lake and falls as snow over land C. lakes overflow and flood due to excess snowfall hs D. enough cold snow falls into a lake to melt it
Answers
water vapor is picked up over a lake and falls as snow over land
What conditions create lake effect snow?When cold air, frequently from Canada, crosses the Great Lakes' open water, Lake Effect snow results. Warmth and moisture are carried into the lowest part of the atmosphere as the cold air travels over the unfrozen and relatively warm waters of the Great Lakes.The sole distinction is that during a larger snow storm, when cold air travels over relatively warm water, lake-enhanced snow occurs, producing greater snowfall rates close to the lake's shore.Lake-effect snowfall can occur everywhere around the lake, although the eastern shore experiences the heaviest and most frequent snowfalls. Orographic uplift and the lake effect combine in some areas of the snowbelt to generate some particularly large snowfalls.To learn more about lake effect refer,
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Neurons in the sympathetic nervous system that synapse onto the adrenal glands release which neurotransmitter?.
Answers
Answer:
Norepinephrine
Explanation:
Norepinephrine gets released by postganglionic neurons of the sympathetic nervous system, which binds to and activates adrenergic receptors.
Altering the dna of organisms has been a controversial topic since the discovery of the structure of dna. Why do you think this is?.
Answers
The altering DNA of organisms result harmful consequences.
DNA is a flexible and dynamic molecule. As a result, due to a process known as mutation, the nucleotide sequences found therein are liable to change.
It is commonly known that genetic alterations can affect how a protein behaves in the body, possibly leading to health issues. Researchers have found that modifications to non-gene-containing sections of DNA (noncoding DNA) can also cause disease.A mutation is a change to an organism's DNA sequence. Errors in DNA replication during cell division, exposure to mutagens, or viral infection can all cause mutations.
Hence, altering DNA of organisms result untreatable diseases.
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Altering an organism's DNA has detrimental consequences. DNA is a flexible and dynamic molecule. As a result, the nucleotide sequences within them can change through a process known as mutation.
It is well known that genetic alterations can affect the behavior of proteins in the body and cause health problems. have found that changes in can also cause disease. A mutation is a change in the DNA sequence of an organism. Errors in DNA replication during cell division, exposure to mutagens, or viral infections can cause mutations. Therefore, modifying the DNA of an organism leads to untreatable diseases. Genetic alterations include chromosomal abnormalities and genetic mutations. Chromosomal abnormalities commonly occur during cell division. They can be numerical, including the number of chromosomes, or structural, including atypical configurations of one or more chromosomes.
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when the muscles of your leg contract to move your lower leg back in order to kick a soccer ball, thus decreasing the angle between the femur and the tibia, the contraction produced is ________
Answers
Skeletal muscles act on the bones and joints to power movement.
What is Smooth muscle?The smooth muscle is the type of muscle that allows you to move your leg to kick a soccer ball. The smooth muscle is represented in diagram A. Smooth muscles may be defined as those muscles that indicate no cross stripes under microscopic magnification.Such types of muscles usually consist of narrow spindle-shaped cells with a single, centrally positioned nucleus.The smooth muscles play an essential role in motility, therefore before kicking a soccer ball you need a small runup which is provided by these muscles.The antagonist actions if muscles like the tibialis anterior and gastrocnemius below the knee move the knee joint. The skeletal muscles of the thighs quadriceps, the hamstrings, and the adductors move the leg from the hip joint.To learn more about smooth muscles, refer to the link:
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A woman carrying the gene for hemophilia (a sex-linked recessive trait), marries a man who is a hemophiliac. What percentage of their children can be expected to have hemophilia?
A. 0%
B. 25%
C. 50%
D. 100%
Answers
Answer:
i think b
Explanation:
The p53 protein is involved in DNA repair and in triggering cell death when repair is not possible. Why are some cancers associated with defective p53 genes? Select all that apply.
Answers
Because cells with damaged DNA are not triggered to die. Because cell growths and divisional is no longer-term regulated by p53 proteins.
What is DNA?Deoxyribonucleic acid is the polymer composed of two by polynucleotide chains and that id coil around to each other to form a double by helix. The polymer and carries genetic instructions for the development, functioning, growth and reproduction of all known by organisms and many viruses. DNA and ribonucleic acid are nucleic acids.
The p53 protein is involved in DNA repair and in triggering cell death when repair is not possible. The are some cancers associated with defective p53 genes Because cells with damaged DNA are not triggered to die. Because cell growths and divisional is no longer-term regulated by p53 proteins.
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In what fundamental way does the structure of a sponge differ from that of all other animals?.
Answers
The structure of a sponge is fundamentally very different from that of all animals because sponges lack true tissues.
Sponges belong to the Phylum Porifera. These organisms are generally marine. Most of them are asymmetrical. They are primitive multicellular animals and they exhibit a cellular level of organization. Sponges do not have true tissues unlike all other animals.
A water transport or canal system is a prominent feature in a sponge. Water enters through tiny pores known as ostia in the body wall into a central cavity and is moved outwards through the osculum. This water transport system aids sponges in nutrition, respiration as well as removal of wastes.
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PLEASE HELP ASAP!!!
Key Questions and Terms
Notes
Discovering DNA: Write a very brief summary of what discovery occurred in each year
1865
1903
1911
1928
1944
1949
1952
1953
2003
Answers
A brief summary of what discoveries that occurred in each year in relation to the studies about DNA is given as follows:
Deoxyribonucleic acid (DNA) is a polymer made up of two polynucleotide chains that coil around one another to create a double helix. The polymer contains genetic instructions for all known organisms and viruses' genesis, functioning, growth, and reproduction. Nucleic acids include DNA and ribonucleic acid.
The information molecule is DNA. It holds instructions for the production of larger molecules known as proteins. These instructions are kept within each of your cells and are dispersed across 46 lengthy structures known as chromosomes. These chromosomes are composed of thousands of shorter DNA pieces known as genes.
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What molecule enters the citric acid cycle and combines with oxaloacetate to form citric acid?.
Answers
What is the transparent front part of the eye that covers the iris, pupil, and anterior chamber?.
Answers
Answer:
The cornea
Explanation:
population change practice question
Answers
Answer:
-Predators
-Disease
-Weather
Explanation:
Squirrels population can be decreasing because they are being hunted by predators.
Disease can be spreading through the forest.
The forest can have harsh weather, making population for squirrels decrease.
Write the working of digestion?
Answers
Answer:
look below
Explanation:
The main organs that make up the digestive system (in order of their function) are the mouth, esophagus, stomach, small intestine, large intestine, rectum, and anus. Helping them along the way are the pancreas, gall bladder, and liver
Answer:
The digestive system breaks down food into nutrients such as carbohydrates, fats and proteins. They can then be absorbed into the bloodstream so the body can use them for energy, growth and repair. Unused materials are discarded as feces
Explanation:
The digestion system is where your body breaks down food into nutrients. Which then can go into your bloodstream creating your "Energy". anything that isn't needed or is excess is discarded down to the next system.
HELP ASAP !!!
How does density cause the separation of Earth’s main layers: Crust, Mantle, Outer core, Inner core?
Answers
The separation of Earth's main layers is primarily caused by differences in density between the layers. Density is a measure of the mass of a substance per unit volume, and it can vary depending on the composition and temperature of the material.
The Earth's crust, which is the outermost layer, is relatively low in density compared to the mantle and core. This is because the crust is composed mostly of lighter materials, such as rock and soil, which have a lower density than the denser metals that make up the mantle and core.
As a result of these differences in density, the crust floats on top of the mantle, much like oil floating on top of water. The mantle, which is the thickest layer of Earth, is composed of hot, dense rock that is semi-solid and capable of flowing slowly over time.
Beneath the mantle is the outer core, which is a layer of molten metal, primarily iron and nickel. The outer core is less dense than the mantle, but more dense than the crust. The inner core, which is the very center of the Earth, is a solid ball of metal that is even denser than the outer core.
Overall, the separation of Earth's main layers is caused by differences in density between the layers, with the densest materials sinking to the center of the planet and the lighter materials floating on top.
Type the correct answer in the box. Spell all words correctly. What connects neurons and what chemicals help neurons communicate? the connects the axon of one neuron with the dendrite of another neuron to relay messages. Neurons transmit information to each other through synaptic gaps. The cells release chemicals known as into the synaptic gaps to communicate with one another.
Answers
The synapse connects the axon of one neuron with the dendrite of another neuron to relay messages.
The cells release chemicals known as neurotransmitters into the synaptic gaps to communicate with one another.
Synapse can simply be called the point of contact between two neurons through which information is passed on. A synapse is composed of: a presynaptic neuron, synaptic cleft, and a postsynaptic neuron.
Neurotransmitters are the signaling agents that carry information in chemical form from one neuron to another. These neurotransmitters are produced inside the nerve cells itself. The example of neurotransmitters are: acetylcholine, dopamine, glutamate, histamine, norepinephrine, etc.
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The only group of elements that do not form ions and are found as monatomic atoms in nature are the.
Answers
Noble gas is only group of elements that do not form ions and are found as monatomic atoms in nature .
Monoatomic elements are elements which are stable and are single atoms. Hence, chemical elements that are stable single atom molecules at standard temperature and pressure are noble gases. Examples include helium, neon, argon, krypton, xenon, and radon.
Noble gases are relatively inert or nonreactive. They also exist as single atoms instead of molecules. Reason behind their inert, or nonreactive nature ,is because their s and p orbitals are filled. So, they do not form ions or compounds.
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which of these research topics would be considered an example of community ecology? A researcher found that the reproductive success of bumblebees decreased when the population density of honeybees increased. The decline in the number of bumblebees appeared to be a result of competition for nectar.
Answers
Ecological community: a collection of species that coexist and interact in a particular area; each species interacts with other species in a particular way; studied based on energy and biomass.
The term "ecological community" refers to a collection of species that are frequently found together. Ecological communities can be assemblages of animals or plants that have similar habitat needs and may interact with one another or depend on comparable environmental processes.What kind of ecological community is an example of?
Examples of community ecology:
All the trees, plants, birds, deer, squirrels, foxes, fungi, insects, fish in forest rivers, and other regional or seasonal species make up a forest community. Similar to this, a community of coral reefs has a variety of fish, coral, and algae species.
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The structure whose abnormal function is associated with Parkinson's disease is the
A. Spinal cord.
B. Basal ganglia.
C. Cerebellum.
D. Primary motor cortex.
E. Skeletal muscle
Answers
The structure whose abnormal function is associated with Parkinson's disease is the Basal ganglia.
When nerve cells in the basal ganglia, a region of the brain that regulates movement, are damaged or killed, it results in the most noticeable signs and symptoms of Parkinson's disease. Dopamine is a crucial brain chemical that is normally produced by these nerve cells or neurons.
Parkinson's disease (PD) is a progressive condition that affects the brain's motor neuron cells, which control how the body moves. Tremor, sluggishness, stiffness, and balance issues are symptoms of dying dopamine-producing neurons. Treatments emphasize symptom relief to free up more energy for action.
The basal ganglia and the substantia nigra, two deep regions of the brain, are affected by the degenerative, progressive disorder known as Parkinson's disease (PD).
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the following pedigree describes a rare trait in humans. when no evidence points otherwise, assume that all individuals marrying into the pedigree are homozygous normal.
Answers
The percentage for the given pedigree is 98.6%.
What are homozygous?
Homozygous, in the context of genetics, refers to having inherited the same version (allele) of a genomic marker from each biological parent. Therefore, a homozygous for a genomic her marker has two identical versions of her for that marker. In contrast, an individual who is heterozygous for a marker has her two different versions of that marker.
homozygous. In diploid species, he has two alleles for each trait or gene on each pair of chromosomes at the same site or locus. one from the father and one from the mother. An allele is one of two or more alternative forms of a gene, found at the same location on the chromosome. Homozygotes refer to identical alleles at a particular locus.
Therefore, The percentage for the given pedigree is 98.6%.
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The new plant produced by the technique of layering must remain attached to the stem of the original plant.
True False
Answers
False. The new plant produced by layering does not have to remain attached to the stem of the original plant.
What is layering?Layering is a method of vegetative propagation of plants in which a part of a plant such as a stem or a branch is pegged to a substrate for that part to develop its own root and establish before it is eventually cut off and transplanted to become a new plant.
Layering can be done in 5 ways. These include
Tip layeringSimple layeringCompound layeringMound layeringAir layeringWhatever the method that is used, the new plant only remains attached to the original plant for some time after which it is usually detached or cut off to become an individual plant on its own.
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Answer: it’s false I think?
Explanation: I hope this helps!!!
10 main threats to biodiversty?
Answers
Answer:Deforestation.
Habitat loss and nature degradation.
Overexploitation.
Water pollution.
Land pollution.
Climate change.
Invasive species.
Over-exploitation for Commercialization
Species extinction
Water logging is a phenomenon in which:
Crop patterns are rotated
Erosion of soil takes placeSoil root zone becomes saturated due to over irrigation
None of the above
Answers
Answer:
Water logging in is a phenomenon in which " Soil root zone becomes saturated due to over-irrigation."
Explanation:
Waterlogging is the natural flooding and over-irrigation that brings water at underground levels to the surface. As a consequence, displacement of the air occurs in the soil with corresponding changes in soil processes and an accumulation of toxic substances that impede plant growth.
genetic variation among humans is relatively small when compared to other species. where in the human genome does most of the diversity occur?
Answers
Compared to many other animals, including our closest evolutionary relative, the chimpanzee, humans genome have significantly less genetic variety.
Where does human genetic variability occur most frequently?African, Genetic research almost universally shows that African populations are more diverse (Figure 1), supporting the idea that modern humans had African origins.
What genetic factors account for human variation?Genetic diversity is mostly caused by mutations. A mutation is a long-lasting change to a DNA sequence. De novo (new) mutations happen when a mistake in DNA replication occurs and is not fixed by DNA repair enzymes. Humans' propensity for multi-step processes and their capacity to transmit learned information from one generation to the next are two possible explanations.
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In the Miller-Urey experiment, electrical sparks were passed through a mixture of gases, including hydrogen, water vapor, methane, and ammonia. These gasses were thought to be present in the atmosphere of early Earth. The results showed that the gasses reacted to form amino acids, which are the building blocks of proteins. Which conclusion about the origin of like on Earth is MOST STRONGLY supported by the Miller-Urey experiment?
A. All organic molecules, including amino acids, were produced from chemical reactions on early Earth.
B. Some organic molecules, including amino acids, could have been produced from chemical reactions on early Earth.
C. Complex organic molecules, such as proteins, could not have been produced from chemical reactions on early Earth.
D. Complex organic molecules, such as proteins, could have been produced from chemical reactions on early Earth.
Answers
Some organic molecules, including amino acids, could have been produced form chemical reactions on early Earth conclusion about the origin of like on Earth is most strongly supported by the Miller-Urey experiment.
What is Miller-Urey experiment?
The Miller-Urey experiment, also known as the Miller experiment or Miller experiment, is a well-known chemistry experiment that mimicked the atmospheric conditions that were thought, in 1952, to exist in the early, prebiotic Earth in order to test the theory of the chemical origin of life under those conditions. Water (H2O), methane (CH4), ammonia (NH3), hydrogen (H2), and an electric arc were all employed in the experiment (the latter simulating hypothesised lightning).
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Which organisms are in a parasitic relationship?
(choose only one answer)
A. a bear finds a den that used to belong to another, now-deceased bear
B. a blood tick attaches to a dog
C. a female spider eats the male spider after mating
D. a plover bird cleans food scraps from a crocodile’s mouth
Answers
What is parasitic?
A parasitic relationship is one in which one species, the parasite, benefits and the other, the host, suffers.
Answer:
The organisms that parasitize humans include fungi, leeches, lice, viruses, protozoa, tapeworm, etc. Few organisms such as Helminthes live inside the intestine of the host and causes several infectious diseases, such as jaundice, malnutrition, diarrhoea, etc.
Wich level of biological claification do mammalia and hominidae repreent, repectively
Answers
Biological classification level taxonomic Mammals belong to classes and Hominidae belong to families
Biological classification taxonomy is the process by which scientists group organisms. Organisms are classified according to their similarities. Historically, similarity was determined by examining the physical characteristics of organisms, but modern taxonomy uses a variety of techniques, including genetic analysis. This helps in accurate identification of different organisms. It helps us to understand the origin and development of organisms. This helps determine the organism's exact place in the taxonomy. Helps develop phylogenetic relationships between different groups of organisms. The purpose of taxonomy is to break a topic down into smaller, more manageable, more specific pieces. Smaller subcategories help us understand the world, and the way these subcategories are created also helps us understand the world. Classification essays are organized by subcategory
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What is the source of energy used to power the sodium-potassium pump?
breakdown of ATP
formation of ATP
transport of ATP by the pump
breakdown of GTP
transport of GTP by the pump
Answers
Answer: Formation of ATP
Explanation:
ATP is formed by an inorganic phosphate molecule held in high-energy thus you answer would be Formation of ATP.
Movement of substances across a cell membrane without using energy is called active transport is true or false
Answers
Movement of substances across a cell membrane without using energy is called active transport is false.
what is active transport?This refers to the process by which molecules or ions move across a cell membrane from a region of lower concentration to a region of a higher concentration, that is against the concentration gradient. Active transport needs cellular energy to achieve this movement.
Typical examples of active transport are as follows the uptake of glucose in the intestines in humans and the uptake of mineral ions into root hair cells of plants.
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in a type ii hypersensitivity reaction, when mismatched blood is administered causing an abo incompatibility, the erythrocytes are destroyed by:
Answers
cell lysis caused by complement.
What transpires in a hypersensitive reaction of type II?An antibody-mediated immune response is referred to as a type II hypersensitivity reaction when antibodies (IgG or IgM) are directed against extracellular matrix antigens and cause cellular death, tissue damage, or functional loss.
What transpires in a type II hypersensitivity reaction to cells that contain incompatible antigens?Cells are destroyed by antibodies in type II hypersensitivity reactions. Blood-transfusion responses, in which host antibodies interact with foreign antigens on incompatible transfused blood cells and facilitate the death of these cells, are the greatest examples of this type of reaction.
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if you think of a cell as a factory that makes proteins and ships them out, which function would the nucleus perform?
Answers
The function which the nucleus would perform is THE BIG BOSS!! (CEO) The boss controls all of the activity inside the cell.
The nucleus plays a number of crucial roles. It controls cellular processes including protein synthesis and cell division since it includes genetic material. The nuclear envelope, nuclear lamina, nucleolus, chromosomes, and nucleoplasm are some of the anatomical components that make up the nucleus. Control over a cell's genetic makeup and, consequently, an organism's inherited traits. The nucleus often appears as a sizable, black organelle at or near the centre of a cell when it is histologically stained. The nucleus controls the synthesis of proteins and enzymes, regulates cell division and growth, stores DNA, RNA, and ribosomes, controls the transcription of mRNA into proteins, and produces ribosomes.
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What molecule is the main carbohydrate fuel molecule burned by all living things?
Answers
Answer:
ATP (Adenosine tri-phosphate)
its an important molecule found in all living things. Think of it as the "energy currency" of the cell. If a cell needs to soend energy to accomplish a task, the ATP molecule splits off one of its three phosphates, becoming ADP ( Adenosine di-phosphate) + phosphate
Answer:
The main carbohydrate fuel molecule burned by all living things is glucose.
Explanation:
Glucose is a simple sugar that is a major source of energy for cells in the body. It is transported through the bloodstream and is taken up by cells, where it is broken down through a process called cellular respiration to produce ATP, the primary energy molecule used by the body. Glucose is the primary fuel for the brain and the nervous system, and it is essential for the proper functioning of all living organisms.