Coat color in one breed of mice is controlled by incompletely dominant alleles so that yellow and white are homozygous, whereas cream is heterozygous. The cross of two cream individuals will produce ____.
A)all cream offspring
B)equal numbers of white and yellow mice, but no cream
C)equal numbers of white and cream mice
D)equal numbers of yellow and cream mice
E)equal numbers of white and yellow mice, with twice as many creams as the other two colors individually

Question

Quizplus · Accepted Answer

In a cross between two cream individuals (heterozygous), the expected offspring ratio according to Mendelian genetics for incomplete dominance is 1:2:1. This means there will be one white (homozygous recessive), two cream (heterozygous), and one yellow (homozygous dominant) for every four offspring, thus resulting in equal numbers of white and yellow mice, with twice as many creams as the other two colors individually.

Coat Color in One Breed of Mice Is Controlled by Incompletely