AP BIOLOGY

HEREDITY

SEX LINKAGE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Colorblindness is more common in males than in females because ____
A
fathers pass the allele for colorblindness to their sons only
B
the allele for colorblindness is located on the Y chromosome
C
the allele for colorblindness is recessive and located on the X chromosome
D
males who are colorblind have two copies of the allele for colorblindness
Explanation: 

Detailed explanation-1: -Since it’s passed down on the X chromosome, red-green color blindness is more common in men. This is because: Males have only 1 X chromosome, from their mother. If that X chromosome has the gene for red-green color blindness (instead of a normal X chromosome), they will have red-green color blindness.

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