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Dvinal [7]
3 years ago
10

PLEASE HELP!!!!!!!!!!

Biology
1 answer:
andrey2020 [161]3 years ago
8 0

Answer:

D

Explanation:

I think

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Since the allele for the color blindness is carried on one of the X -chromosomes of the  carrier mother, then  the male children will be color blind or carrier deopending on the defective gene they inherited. Since they will receive the defective or normal  allele from the  mothers,but the female will carriers or normal because they will inherit either defective allele or normal allele from the mother,but normal  X allele from the father.

Assuming the colorbind gene was inherited by One of the boys, and the girls take the defective genes

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2.If the two boys take the effective genes from the mothers. and none of the girls take the defective alelle

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The proportions that will be  the females  since the girls can only take the defective allele from one of the normal and defective allele from the mother. Assuming the girls  take the defective allele from the mothers and take normal from the father,they will all  be carriers,since the X of the father is normal.

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