I NEED HELP NOWWW.!
Sexual reproduction influences genetic variation. Which of the following properly describes the influence that sexual reproduction has on genetic variation?

A) Crossing over occurs during meiosis, which results in the exchange of alleles between homologous chromosomes. This exchange of genetic material allows for the production of new combinations of alleles in gametes and an increase in genetic variation.

B) Crossing over occurs during mitosis, which results in the exchange of alleles between homologous chromosomes. This exchange of genetic material allows for the production of new combinations of alleles in gametes and an increase in genetic variation.

C) Crossing over occurs during mitosis, which results in the exchange of alleles between sister chromatid. This exchange of genetic material allows for the production of identical combinations of alleles in gametes and a decrease in genetic variation.

D) Crossing over occurs during meiosis, which results in the exchange of alleles between sister chromatid. This exchange of genetic material allows for the production of identical combinations of alleles in gametes and a decrease in genetic variation.

Answers

Answer 1

Answer:

C

Explanation:

Answer 2

The statement that best describes the influence that sexual reproduction has on genetic variation is as follows:

Crossing over occurs during mitosis, which results in the exchange of alleles between homologous chromosomes. This exchange of genetic material allows for the production of new combinations of alleles in gametes and an increase in genetic variation.

Thus, the correct option for this question is B.

What is Crossing over?

Crossing over may be defined as a biological mechanism through which genetic material gets exchanged between the non-sister chromatids of the homologous chromosomes. The process of crossing over occurs in the Pachytene stage of mitosis.

Option C is incorrect because the process of crossing over never occurs between sister chromatids. So, it is eliminated. While options A and D are incorrect because they describe the mechanism of crossing over in the sense of meiosis which is absolutely incorrect.

Therefore,  the correct option for this question is B.

To learn more about Crossing over, refer to the link:

https://brainly.com/question/927405

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Related Questions

What is matter? Write any two properties of matter?​

Answers

Answer:

anything that has weight and occupies space

Explanation:

Matter is anything, such as a solid, liquid or gas, that has weight (mass) and occupies space.  

For anything to occupy space, it must-have volume.

Al2(SO4)3 + 6 K --- > 3 K2SO4 + 2 Al


In an experiment, 46.8 grams of aluminum sulfate is reacted to make how many grams of potassium sulfate?

Answers

The answer is 71.5g of potassium sulfate

When you watch a sunset, is the Sun really moving across the sky? What's happening?
(Science)

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It is the earth spinning around its axis. It makes a complete turn every 24 hours. It turns toward the east

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Answer:

I think the correct answer would be the second one

I believe the answer is d. all the above

A certain first-order reaction has a half-life of 20.0 minutes. How much time is required for this reaction to be 75% complete?

Answers

Answer:

X = 2

Explanation:

As you know, the rate of a first-order reaction depends linearly on the concentration of a single reactant. The rate of a first-order reaction that takes the form

What causes heat or the transfer of energy from one object to another

Answers

Answer:

The answer is kinetic energy

Please Help Me. Thank You!!!
Molten aluminium is formed at the ____________ electrode where positive Al3+ ions are reduced to aluminium ions. The liquid aluminium runs to the bottom of the cell, where it is tapped off.

Answers

Explanation:

this is you questions answered

6. Three ice cubes are placed inside a glass of hot chocolate. Which of the following best
explains the heat transfer occurring inside the glass?
bat abanslate
ITS NUMBER 6!!!
PLZZ HELP ASAP!!!

Answers

It’s the first 1 M yea it’s the first one

The unique shape of DNA allows what

Answers

Answer: to copy itself during cell division

Explanation:

2. Combine lead (II) nitrate and potassium iodide solutions.

Pb(NO3)2+ Kl →

2. Combine lead (II) nitrate and potassium iodide solutions.
Pb(NO3)2+ Kl →
3. Combine magnesium metal and hydrochloric acid solution.
Mg + HCl →
4. Electrolysis (splitting) of water.
H2O →
5. Burning magnesium.
Mg + O2 →

Answers

Answer:

Pb(NO3)2+ 2Kl →PbI2 + 2KNO3

Mg + 2HCl → MgCl2 + H2

4H2O → 4H^+ + 4OH^-

2Mg + O2 → 2MgO

Explanation:

This question has to do with the balancing of chemical reaction equations. The general rule for balancing chemical reaction equation is that the number of atoms of each element on the left hand side of the reaction equation must be equal to the number of atoms of the same element on the right hand side of the reaction equation.

This principle was followed in balancing each reaction equation above. For instance, in the burning of magnesium, there are two atoms of both magnesium and oxygen on either side of the reaction equation.

Which group of microorganisms has the ability to mutate?

Answers

I think it’s viruses .

In 2005, scientists used cells from a dog named Tai to produce a new puppy with DNA identical to Tai's.

What genetic technology was used?

Answers

Answer:

Cloning

Explanation:

This is the process of producing a organism genetically identical to the organism the cells came from.

Answer: cloning

Explanation:

The following diagram represents the potential energy for the reaction:



The curves represent two possible reaction paths for the decomposition of ammonia, NH3. One can correctly conclude from the graph that the largest activation energy shown for the decomposition of NH3 corresponds to which labeled interval?

C
E
A
B
D

Answers

A is the answer I reckon

Answer:

Look in the picture ;)

Explanation:

Yes
OO
No
Balanced or Not Balanced? *
2 NaCl + 2 F2 → 2 NaF + 1 C12
Yes
No

Answers

Answer:

No, not well balanced

Explanation:

2Nacl+F2=2Naf+Cl2

Elements are organized on the table according to their _____________ ___________ , usually found near the top of the square.

Answers

Answer:

atomic number

Explanation:

Elements are organized on the table according to their atomic number, usually found near the top of the square.

Answer:

by their atomic number

hope this helped

Find the mass of 3.27 x 10^23 molecules of H2SO4. Use 3 significant digits
and put the units.

Answers

Answer:

Approximately [tex]53.3\; \rm g[/tex].

Explanation:

Lookup Avogadro's Number: [tex]N_{\rm A} = 6.02\times 10^{23}\; \rm mol^{-1}[/tex] (three significant figures.)

Lookup the relative atomic mass of [tex]\rm H[/tex], [tex]\rm S[/tex], and [tex]\rm O[/tex] on a modern periodic table:

[tex]\rm H[/tex]: [tex]1.008[/tex].[tex]\rm S[/tex]: [tex]32.06[/tex].[tex]\rm O[/tex]: [tex]15.999[/tex].

(For example, the relative atomic mass of [tex]\rm H[/tex] is [tex]1.008[/tex] means that the mass of one mole of [tex]\rm H\![/tex] atoms would be approximately [tex]1.008\![/tex] grams on average.)

The question counted the number of [tex]\rm H_2SO_4[/tex] molecules without using any unit. Avogadro's Number [tex]N_{\rm A}[/tex] helps convert the unit of that count to moles.

Each mole of [tex]\rm H_2SO_4[/tex] molecules includes exactly [tex](1\; {\rm mol} \times N_\text{A}) \approx 6.02\times 10^{23}[/tex] of these [tex]\rm H_2SO_4 \![/tex] molecules.

[tex]3.27 \times 10^{23}[/tex] [tex]\rm H_2SO_4[/tex] molecules would correspond to [tex]\displaystyle n = \frac{N}{N_{\rm A}} \approx \frac{3.27 \times 10^{23}}{6.02 \times 10^{23}\; \rm mol^{-1}} \approx 0.541389\; \rm mol[/tex] of such molecules.

(Keep more significant figures than required during intermediary steps.)

The formula mass of [tex]\rm H_2SO_4[/tex] gives the mass of each mole of [tex]\rm H_2SO_4\![/tex] molecules. The value of the formula mass could be calculated using the relative atomic mass of each element:

[tex]\begin{aligned}& M({\rm H_2SO_4}) \\ &= (2 \times 1.008 + 32.06 + 4 \times 15.999)\; \rm g \cdot mol^{-1} \\ &= 98.702\; \rm g \cdot mol^{-1}\end{aligned}[/tex].

Calculate the mass of approximately [tex]0.541389\; \rm mol[/tex] of [tex]\rm H_2SO_4[/tex]:

[tex]\begin{aligned}m &= n \cdot M \\ &\approx 0.541389\; \rm mol \times 98.702\; \rm g \cdot mol^{-1}\\ &\approx 53.3\; \rm g\end{aligned}[/tex].

(Rounded to three significant figures.)

ILL GIVE 100 POINTS!!!HELP!! THIS IS FOR CHEM!!an object acted upon by an unbalanced force will accelerate in the direction of the force is newtons what law?

1:second law

2:first law

3:third law

Answers

it’s newton’s first law but that’s a physics question

PLEASE HELP: 60 POINTS

Select all that apply!

The emission of a Beta particle has the effect of:


a change in mass of an electron emitted from the nucleus
decreasing mass by one unit
increasing mass by one unit
adding a proton to the nucleus
converting 1 neutron to 1 electron and 1 proton

Answers

the answer is “decreasing mass by one unit”

PLEASE HELP!! Is this an element or compound?
copper (ll). oxide (CuO)
Please hurry!!

Answers

Answer: Compound

Explanation:

Copper(II) oxide or cupric oxide is the inorganic compound with the formula CuO. A black solid, it is one of the two stable oxides of copper, the other being Cu₂O or copper(I) oxide. As a mineral, it is known as tenorite.

True or false: Heterotrophs need to go find and eat food.?


:FALSE

:TRUE

Answers

Answer:

Explanation:

Heterotrophs cannot make their own food, so they must eat or absorb it. For this reason, heterotrophs are also known as consumers. Consumers include all animals and fungi and many protists and bacteria. They may consume autotrophs or other heterotrophs or organic molecules from other organisms

Which type of bonding forms due to electrical attractions between oppositely charged elements

Answers

Answer:

Explanation:

Ionic bond

Ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound.

Can y’all helping me solving this l will make you the brainlest❤️

Answers

Answer:

Genotype = genetic makeup or allele combination

phenotype = physical appearance

homzygous = both alleles are the same

heterozygous = both alleles are different

dominant allele = represented by a capital letter

recessive allele = lowercase letter

x=2 and y=3
find the value of
3x + y
3x² - 4
solve this please ty​

Answers

Answer:

3x+y = 9

3x² - 4 = 8

Explanation:

3x+y

3(2)+3

9

3x2-4

3(2)^2-4

3

What is the molar mass of the following compound: C1H3P2

Answers

the molar mass is44.26

Which of the following could not be an empirical formula? a CH4 b Na2O c NaCl d H2O2

Answers

Answer:

C NaCl will not be an empirical formula.

Answer:

C naCl

Explanation:

it wouldnt be an empiricla formula

Calculate the concentration:

2a) 45g of sodium hydroxide in 3dm3 of solution.

2b) 0.256g of sodium chloride in 500cm3 of solution.

Answers

Answer:

2a) 15 g/dm3

2b) 0.512 g/dm3

Explanation:

Use the concentration = mass/volume equation.

how many molecules are there in 0.45 moles of so3

Answers

Answer:

2.71

Explanation:

8. The most common element used in nuclear fission reactors is uranium. The three nuclides, U-233, U-235, and U-238, are isotopes of uranium because they have the same number of protons per atom and...*
(1) the same number of electrons per atom
(2) the same number of neutrons per atom
(3) a different number of electrons per atom
(4) a different number of neutrons per atom​

Answers

Answer:(D) different number of neutrons per atom

Explanation: Honestly, I just looked it up on Socratic.

how heart attacks and Strokes caused by cholesterol​

Answers

With high cholesterol, you can develop fatty deposits in your blood vessels. Eventually, these deposits grow, making it difficult for enough blood to flow through your arteries. Sometimes, those deposits can break suddenly and form a clot that causes a heart attack or stroke.

Answer:

Cholesterol is a waxy substance found in your blood. Your body needs cholesterol to build healthy cells, but high levels of cholesterol can increase your risk of heart disease.

With high cholesterol, you can develop fatty deposits in your blood vessels. Eventually, these deposits grow, making it difficult for enough blood to flow through your arteries. Sometimes, those deposits can break suddenly and form a clot that causes a heart attack or stroke.

Explanation:

High cholesterol can cause a dangerous accumulation of cholesterol and other deposits on the walls of your arteries (atherosclerosis). These deposits (plaques) can reduce blood flow through your arteries, which can cause complications, such as:

Chest pain. If the arteries that supply your heart with blood (coronary arteries) are affected, you might have chest pain (angina) and other symptoms of coronary artery disease.

Heart attack. If plaques tear or rupture, a blood clot can form at the plaque-rupture site — blocking the flow of blood or breaking free and plugging an artery downstream. If blood flow to part of your heart stops, you'll have a heart attack.

Stroke. Similar to a heart attack, a stroke occurs when a blood clot blocks blood flow to part of your brain.

The inflation of airbags is due to the breakdown of a single chemical substance into two separate substances.

Two molecules of sodium azide (NaN3) break down into sodium (Na) and nitrogen gas (N2) during the reaction.

How many sodium (Na) atoms are produced in the reaction?

1 Na atom
2 Na atoms
3 Na atoms

Answers

Answer:

The correct answer would be

B. 2 Na atoms

Explanation:

As seen in the picture below,

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