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zhannawk [14.2K]
2 years ago
5

Suppose there are two homologous chromosomes. Each chromosome contains a single mutant allele in different parts of the chromoso

me. How can crossovers be beneficial in this situation? (Hint: How can you create a single, mutation-free chromosome?)
I NEED HELP​
Biology
1 answer:
Harlamova29_29 [7]2 years ago
8 0

Answer:

Cross overs can lead to formation of chromosome pairs that have no mutant allele.

Explanation:

Cross overs can lead to formation of chromosome pairs that have no mutant allele.

For example -

Suppose "X" is a mutant  allele and "x" is a mutant free allele.

Now when two homologous chromosomes contains a single mutant allele in different parts of the chromosome are crossed the following offspring are produced

X x

X XX Xx

x Xx xx

"xx" is a mutant free genotype.

Thus, crossing over can create a single mutation-free chromosome

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