Color Blindness Problem Set

Problem 4: Genotype of Audrei's sister Caroline


What is the genotype of Audrei's sister Caroline, who has normal vision?
A. homozygous for the dominant, normal vision allele
B. heterozygous carrier of the red-green color blind allele
All of Sidney's daughters received the red green color blind allele from their father. Since Caroline has normal color perception she inherited the normal allele from her mother.
C. homozygous recessive for the red-green color blind allele
D. cannot be determined from the information given

The Biology Project
University of Arizona
Saturday, October 10, 1998
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