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lions [1.4K]
3 years ago
12

Genetic variation, provided through sexual reproduction, offers more opportunity for offspring to survive in changing environmen

ts. What two aspects of meiosis provide sources of such variation?A. Mutation and fertilizationB. Crossing over and allelic exclusionC. Segregation and independent assortmentD. Crossing over and independent assortment of chromosomes
Biology
1 answer:
Phoenix [80]3 years ago
7 0

Answer:

Option D.

Explanation:

Crossing over is an important characteristic of meiosis which provides the genetic variation and various allelic combinations present in the offspring. Hence the answer is option D.

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Which viral genome is likely to require an RNA-dependent RNA polymerase for transciption upon viral entry?
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Answer:

(-) sense single-stranded RNA

Explanation:

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6 0
3 years ago
What does it mean to say that mutation is the ultimate source of genetic variation?
Snowcat [4.5K]
When it is said that mutation is the ultimate source of genetic variation it means that it creates several new combinations which is similar to  meiosis and fertilization because <span> new alleles and genes appear. It is just about some common points.</span>
3 0
3 years ago
Explain the steps that you would use to focus on a specimen under a compound light microscope.
Rashid [163]

To start, move the objective lens to its lowest power setting. Place a slide on the stage with the label side up and the cover slip in the middle. You can only use the coarse focus knob when the power is low. If you can't see anything, move the slide a little while you look and focus. If nothing shows up, turn down the light and move the slide a little while you're looking and focusing. Once you're in focus on low power, move the slide to make the object of interest in the middle of it. Turn the objective to medium power and only change the fine focus. If you need to, turn the objective to high power and only adjust the fine focus.

8 0
2 years ago
________ is a process that creates genetic variety in cells. (2 points)
Zigmanuir [339]

Answer:

B

Explanation:

I believe it is meiosis because there are two parts in which it helps to increase genetic variety. In prophase 1, the genes cross over, which increases the variety. Also, the chromosomes are assigned randomly in Metaphase 1.

Hope this helps:)

4 0
3 years ago
Read 2 more answers
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