Blue eyes result from recessive genotypes in humans. Two blue-eyed parents have a brown-eyed child. This indicates: Select one:
a. the alleles causing blue eyes in the two parents are at different loci.
b. the alleles causing blue eyes in the two parents are at the same locus.
c. there was a failure of the alleles to complement
d. the blue genotype has lower expressivity in the parents
e. the blue genotype has high penetrance in the offspring
Answer:
a. the alleles causing blue eyes in the two parents are at different loci.
Explanation
Ex:
Blue = AAbb or aaBB
Brown = A_B_
AAbb x aaBB ---Parents
AaBb (brown)--Progeny
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