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Biology

1 answer:

svetoff [14.1K]3 years ago

4 0

Answer:

C. Meiosis produces new combinations of chromosomes.

Explanation:

Compared to mitosis, meiosis divides TWICE and has EIGHT stages of rather than mitosis with the regular four stages.

The end result in Meiosis produces haploid cells in which half of the amount of chromosomes are produced in each individual cell, therefore Meiosis produces new combinations of chromosomes.

A. is incorrect because Meiosis does NOT create genetically identical cells.

B. is incorrect because Meiosis creates a HALF set of chromosomes (or just half than the original amount).

D. is incorrect because DNA is not produced during meiosis.

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Why cells divide and what happens to genetic material during cell division.

cricket20 [7]

Cells divide for many reasons. For example, when you skin your knee, cells divide to replace old, dead, or damaged cells. Cells also divide so living things can grow. ... Organisms grow because cells are dividing to produce more and more cells.

4 0

3 years ago

I’m having trouble understanding this can someone plz explain?

Leni [432]

Answer:

look at the pictures

Explanation:

1. If we cross the parental generation which is RR x rr, the probability of the F1 generation to get rough coat is 100% and they will be a carrier of the recessive trait smooth coat.

Since the phenotypic ratio is 100% heterozygous Rr, in crossing the F1 to get the F2, we will use the genotype Rr. To get the F2, use the cross Rr x Rr.

The phenotypic ration for F2 is 3:1. There is 75% to get rough coat and 25% smooth. The answer is based on the result on the Punnett square. On the other hand, the genotypic ratio is 1:2:1. There is 25% probability to get RR genotype, 50% Rr, and 25% rr.

2. Since the two parental mice got 6 albino offspring and 5 brown mice offspring, it is approximately 50%. it takes a parental mice who is Brown that is carrying an albino trait crossed with an albino to get offspring with almost the same number. Therefore, the genotype of the brown mice is Aa.