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sladkih [1.3K]
3 years ago
9

Red-green color blindness is a sex-linked recessive trait in humans. Two people with normal color vision have a color-blind son.

What are the genotypes of the parents?
Biology
1 answer:
Alborosie3 years ago
6 0

Genotype of Mother: XX°

Genotype of Father: XY

Explanation:

  • Since the Red-green colour blindness is a recessive trait , it will not be visible in a heterozygous female because dominant allele will mask the recessive allele.
  • Father has only one X chromosome, thus if the trait was present in  that X chromosome he must have shown the trait because all the alleles in Y chromosome are recessive.
  • Since the son has inherited the trait it is obvious that he had recieved the trait from his mother who must have been the carrier.
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