Two Martians fall in love and marry. One Martian is homozygous for red eyes and the other is heterozygous. The recessive eye color is purple. What is the probability that they will have a child with purple eyes (assuming Martians have similar genetics to humans)?
A) 1/1
B) 1/2
C) 1/4
D) 3/4
E) 0

Question

Quizplus · Accepted Answer

Since one parent is homozygous for red eyes (RR) and the other is heterozygous (Rr), all their children will have at least one dominant allele for red eyes (R), making it impossible for them to have purple eyes, which would require two recessive alleles (rr).

Two Martians Fall in Love and Marry