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suter [353]
3 years ago
12

Which expression correctly represents a reproductive

Biology
1 answer:
tekilochka [14]3 years ago
5 0
This is referring to meiosis, which happens just once to make reproductive cells, unlike mitosis which is just simple copying.

In mitosis, one cell splits into two, but the number of chromosomes doesn't change. The original cell makes two copies of its chromosomes and divides them up.

\boxed{(2n\rightarrow\ 2n)}

In <em>meiosis</em>, however, our cell doesn't bother making those two copies. It just takes what it has and divides it between two new cells.

\boxed{(2n\rightarrow\ n)}

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Explanation:

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Chromosomes that form a pair and are found together are called homologous chromosomes, and they are inherited from each parent. During prophase of meiosis I, the homologous chromosomes exchange segments of DNA in a process called crossing over. This recombination creates genetic diversity because genes from each parent are exchanged. <u>It results in new combinations of genes on each chromosome.</u>

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