Aaron and his sister April both received one defective color gene from their mother.Aaron will have _____, and April will have _____.
A)a color weakness; a color weakness
B)normal color vision; normal color vision
C)a color weakness; normal color vision
D)normal color vision; a color weakness

Question

Quizplus · Accepted Answer

Males (like Aaron) have one X and one Y chromosome, so a defective gene on the X chromosome will result in color weakness. Females (like April) have two X chromosomes, so one defective gene will not affect their color vision if the other X chromosome has a normal gene.

Aaron and His Sister April Both Received One Defective Color