Sara is color blind. Her classmates don't believe her and say that color blindness can only occur in males. Which of the following would explain Sara's inheritance of color blindness best to her classmates?

A) Sara is homozygous recessive for color blindness, inheriting the mutant alleles from her father and her mother.
B) Sara is heterozygous for color blindness, inheriting one mutant copy of the gene from her father.
C) Sara is color blind because she inherited a recessive allele from her mother and a normal allele from her father.

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Hannah Bautista · Accepted Answer

Final Answer : A, Explanation :  Color blindness is a sex-linked trait, typically associated with the X chromosome. Since females have two X chromosomes, a female (like Sara) would need to inherit the mutant allele for color blindness from both parents (her mother and her father) to express the trait. This means she is homozygous recessive for color blindness.

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