what happens during metaphase 1 that leads to genetic variation?
Answer: In metaphase I, the tetrads line themselves up at the metaphase plate and homologous pairs orient themselves randomly. This variation is due to independent assortment and crossing-over during meiosis, and random union of gametes during fertilization.
Explanation:
Answer:
In metaphase I, the tetrads line themselves up at the metaphase plate and homologous pairs orient themselves randomly. This variation is due to independent assortment and crossing-over during meiosis, and random union of gametes during fertilization. In metaphase I, the orientation of homologous pairs is random as they line up along the center of the cell. Each homologous pair can line up in two different ways. Differences in the homologous pairs' orientation in metaphase I lead to variation in how the chromosomes are separated and grouped together in anaphase I.
Changes in the orientation of tetrads along the center of the cell vary the combination of chromosomes in the resulting daughter cells.
Having an extra finger is rare, but controlled by a dominant gene. If a
normal parent and a heterozygote parent have a child, what is the
probability that they will have a child with an extra finger?
Answer:
if the child was meant to be a twin but then if the twins got mixed up with each other, the one that's
lucky to come out will have part of the other.
and if the other twin doesn't come out great the other either has to have a second head, 6th finger, etc. ...
Which does of the following doe not add nitrogen to the soil? A death and decomposition B photosynthesis C nitrogen-fixing bacteria D animal waste
Answer:
c
Explanation:
Which of the following substitutions can help reduce air pollution?
Answer:
Carbon dioxide!
Explanation:
Because plants will take this in and produce oxygen
Rey, who has a normal vision (XY),married Cindy
who has a normal vision but carries a gene for
color-blindness (XX) What is the chance to
have a colorblind baby girl?
Answer:
There is no chance that Rey —who has a normal vision man— and Cindy, who is a woman colorblind carrier, will have a colorblind daughter.
Explanation:
If a man with normal vision and women who is a carrier of colorblindness has a daughter there is a 50/50 chance of having a colorblindness carrier daughter. And all daughters would have normal vision.
Color blindness is a visual condition characterized by the inability to discern some colors, and has a recessive inheritance pattern linked to the X sex chromosome. This means that all males with the defective gene (Xd) would be color blind, while a female to be color blind must have both X chromosomes affected.
In the case of Rey and Cindy
♂ XY
♀XdX
Alleles X Y
Xd XdX XdY
X XX XY
Of the daughters they have, half could be carriers, while the other half would not have the altered gene. In any case, none of their daughters could be colorblind.
Which statement explains one way that minerals form?
O They are mined from rocks.
O They are produced from molten minerals.
O They are grown in a laboratory.
O They are washed up on a seashore.
Answer:
O They are produced from molten minerals.
Explanation:
Minerals can be produce form molten rocks or materials in nature.
Minerals are solid inorganic compounds with a definite composition and an ordered atomic arrangement.
Minerals are naturally formed. When rocks melt, they can aggregate or concentrate certain minerals in parts of the melt. This process known as differentiation takes place at different temperature and pressure conditions in a molten rock.what does it mean to say early Earth was abiotic? someone plz help
Answer:
abiotic basically means NON LIVING (like water,soil, air)
so.. earlier like thousands of years back there was no life on earth thus it is said that earth was abiotic
but later on biosphere arrived through maybe cynobacteria...
Which characteristic do cows and dogs share?
Answer:
They are both mammals with tails.
Explanation:
Hope this helps!
What macromolecules is made up of fatty acids and is found in glycerol
Answer:
Lipids
Explanation:
I think lipids are the answer.
Which of the following is an example of a luminous object?
sofa
orange
lamp
radio
Why are enzymes important for living organisms?
What makes it possible for the plant to grow from the bricks
Answer:
Explanation:Most plants the manage to grow from bricks and or concrete are mostly weeds that do not need light to grow. They are 100% dependant on if they get any sun or not. If you put seeds under concrete they would not make it, if you put them in a crack in concrete they might have a chance it all depends on the light they get.
How does the author organize the text or ideas in the article? Check all that apply. by using paragraphs to focus on ideas by using images that help explain or focus on an idea by using an outline to list the steps in a process by using a table to show steps in a process by using subheadings to separate steps in a process
Answer:
by using paragraphs to focus on ideas, by using images that help explain or focus on an idea, by using subheadings to separate steps in a process
Explanation: i got it right on edge 2020
Text organization are those ways which a text is arranged to make them easier to read, understand and get main ideas from.
As a result of this, an author may use different types of organization to show an idea which otherwise, the person would have missed.
There are different ways a text can be organized such as:
ChronologicalSpatialSequenceProblem and solutionCause and effect, etcHowever, it should be noted, that a writer can use things like paragraphs, images, outlines, subheadings, etc to arrange his text.
Please note that your question is incomplete, so i gave you a general overview which should help you get the correct answer.
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What are the 2 types of crust found on Earth’s surface?
Answer:
oceanic crust and continental crust
Explanation:
Answer:
Theres oceanic and continential
Explanation:
PLEASE MARK ME BRAINLIEST
Which of the following is NOT a skill scientists use to learn about the world?
a.
Predicting
c.
Inferring
b.
Observing
d.
Scientists use all of the above skills
Answer:
d
Explanation:
Which does the electron transport chain do during
cellular respiration?
A. Provides energy for pumping of hydrogen ions
B. Makes more energy carriers for respiration
C. Breaks down glucose into pyruvate molecules
D. Uses carbon dioxide and water to make glucose
Answer:
During this process electrons are exchanged between molecules, which creates a chemical gradient that allows for the production of ATP. The most vital part of this process is the electron transport chain, which produces more ATP than any other part of cellular respiration.
Answer:
a. provides energy for pumping of hydrogen ions
Explanation:
If a cell was not able to produce enzymes, it could not do which of the following?
a) Raise the activation energy of vital chemical reactions, causing them to proceed too quickly
b) Lower the activation energy of vital chemical reactions, causing them to proceed too quickly
c) Raise the activation energy of vital chemical reactions, causing them to proceed too slowly
d) Lower the activation energy of vital chemical reactions, causing them to proceed too slowly
Questioned in https://brainly.com/question/18901979
Answer:D
Explanation:if your cell doesn’t produce enough enzymes it wouldn’t be available to speed up reactions throughout your body, and they would also not be available to make the many organelles made with proteins.
Cellular respiration is a process involving the breakdown of glucose molecules in order to generate energy for cellular activities. Given the general reaction below, which of the following best describes the products labeled x and y? C6H12O6 + O2 → _x___ + __y___ + energy
Answer:
x is CO2 and y is H2O
Explanation:
When glucose (C6H12O6) reacts with oxygen, carbon dioxide and water are produced. The balanced equation for this reaction is: If 12 moles of oxygen react, The reaction consumes moles of glucose (C6H12O6). The reaction produces moles of carbon dioxide and moles of water.
Why do we say chloroplasts look like green footballs even though a lot of the time they look like perfect green spheres?
Answer:
Explanation:
The football used in American Football is an oval. Chloroplasts can be spherical but also oval-shaped. For the rest of the world, football is what people in the U.S. call soccer. So a football can also be spherical in shape and thus chloroplasts can be spherical just like footballs are. Chloroplasts can also be disc-shaped.
A student conducted an experiment to test whether talking to plants would help them to grow faster. He set up the following two groups: Group 1: spoken to and hand watered Group 2: not spoken to and watered with sprinklers After three weeks, the plants in Group 1 showed much more growth than those in Group 2. Based on the results of this experiment, which is the best conclusion?
A researcher must keep constant all the variables that are not of interest, so they can not affect the experiment results. B) They are not valid because the student did not control all the variables that can affect plant growth.
What are the variables involved in an experiment?Independent variable
This variable is the one that affects the response of the dependent variable. Any change that occurs in the independent variable will rebound on the dependent variable and will be reflected in the experiment results.
Dependent variableThis variable is the one that completely depends on other variables, meaning that any change that occurs in other variables will cause a modification on this one. It depends on the independent variable.
When conducting an experiment, several variables might affect the results. Since the researcher is only interested in studying how the independent variable influences the dependent one, he or she must keep constant all the remaining variables so they will not influence the response.
Controlled variables -constant variable-
These are all the other variables that must be kept under control so they do not affect the results of the experiment. Their values or states must be constant in the control and experimental groups.
In the exposed example, the student is interested in knowing how talking to plants would help them to grow faster.
Independent variable ⇒ talking to plants
Dependent variable ⇒ plants' growth rate
In this case, the constant variable should be the way in which the student provide water to the plants. However, the students use two different ways to water the plants: hand watering and with sprinklers.
Since this last variable is not controlled and is not constant in the control and the experimental group, it will indeed affect the plants' growth rate.
The experiment fails in keeping constant the controlled variable.
The correct option is B) They are not valid because the student did not control all the variables that can affect plant growth.
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Complete question
A student conducted an experiment to test whether talking to plants would help them to grow faster. He set up the following two groups:
Group 1: spoken to and hand wateredGroup 2: not spoken to and watered with sprinklersAfter three weeks, the plants in Group 1 showed much more growth than those in Group 2. Based on the results of this expe ment, which is the best conclusion?
A) They are valid because the student ran a controlled experiment.
B) They are not valid because the student did not control all the variables that can affect plant growth.
C) They are valid because the dependent variable caused a change in the independent variable.
D) They are not valid because the time frame to grow a plant is too short.
Use the following diagram to answer the question:
The gas released in this investigation is
hydrogen
carbon dioxide
oxygen
nitrogen
Answer:
oxygen
Explanation:
the plant produce o2 while respirating using co2 and sunlight
In order to be able to make proteins, RNA has to migrate or travel to the....
Answer:
In order to be able to make proteins, RNA has to migrate or travel to the cell cytoplasm.
Explanation:
RNA, specifically messenger RNA (mRNA) is responsible for carrying the genetic information needed for make proteins, so it must migrate from the cell nucleus to the cytoplasm.
DNA transcription and RNA synthesis, as well as maturation, occur in the cell nucleus. From there, the mRNA must travel to the cytoplasm to meet the ribosomes and initiate protein synthesis.
Bile is needed to break down _____.
protein
starch
fat
sugar
Answer:
fat
Explanation:
which of the following is true about the Earth’s layers? A The asthenosphere is the thickest of Earth’s layers. B All of the layers are liquid and extremely hot. C There is little to no pressure on the solid core. D The Earth’s core has two different parts.
Answer:
The Earth's geosphere is divided into three chemical sections: The crust, composed almost entirely of light elements, like silicon. The mantle, which is 68% of the Earth's mass. The core, the innermost layer; it is composed of very dense elements, such as nickel and iron.
Explanation:
In Geosphere is the solid or mineral part of the Earth, consists of layers, from the outer crust down to the inner core, which have separated through density and temperature.
How many gametes are produced at the end of Meiosis 2 and are they identical or different from the original cell?
Answer:
4 gametes
The cells that enter meiosis II are the ones made in meiosis I. These cells are haploid—have just one chromosome from each homologue pair—but their chromosomes still consist of two sister chromatids. In meiosis II, the sister chromatids separate, making haploid cells with non-duplicated chromosomes.
Explanation:
Please help asap!
Summarize the process of cellular respiration in your own words. Consider where you get the initial glucose from and all of the outputs when making your summary.
The cellular respiration process is as follows:
Glucose is the main sugar that circulates in the blood and is the first source of energy in the body for living beings that comes from the food we eat.Through the oxidation of glucose, various compounds are produced that provide energy, the body absorbs sugar from food and transforms it into energy thanks to metabolic activity.Said metabolic reactions is known as cellular respiration that take place inside the cells of living beings, through which chemical energy is obtained from the decomposition of organic molecules.The process of cellular respiration consumes glucose as fuel and oxygen as final electron receptor (oxidant) in reaction with pyruvic acid.Thus, carbon dioxide (CO2), water (H2O) and numerous amounts of ATP, the molecule of biochemical energy, are obtained.Therefore, we can conclude that cellular respiration involves a metabolic process by which glucose is initially oxidized and energy and water are produced.
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Which of the following statements accurately describes a pedigree chart?
A pedigree chart tracks inherited traits from parents to offspring.
A pedigree chart is used to predict the genotype of offspring.
A pedigree chart predicts the percentage of offspring that will have a specific trait.
A pedigree chart identifies the phenotype of the organism.
Answer:
A pedigree chart tracks inherited traits from parents to offspring.
Explanation:
A pedigree chart simply tracks inherited traits from parents to offspring. It is used to establish the genetic relationships between parents and their progeny.
Based on the available evidence, the chart walks through the genetic records of a family line. Parents and offspring's genetic history can be established by the chart. The chart is then further used to make predictions about genetic patterns for the family.Answer:
a
Explanation:
helppp pleasee i will give BRAINLIST
suggest what would happen to a cell if it were prevented from going through the cell cycle.
Answer:
If a cell doesn't make it through the cell cycle, or doesn't pass .. It has to restart and go through G0. It's something like a loop out when they don't go through the cell cycle
Explanation:
Photosynthesis and respiration can be thought of as
Answer:
Eating and digesting. Photosynthesis is used to make food, and respiration is used to turn that food into energy.
Answer:
Both photosynthesis and respiration can be thought of as a cycle.
Explanation:
These two cellular processes can be thought as a cycle since the products of one are used as the raw materials of the other.