Pure-breeding yellow guinea pigs crossed with pure-breeding white ones produce only cream-colored

offspring. This pattern indicates incomplete dominance. Rough hair is found to be dominant to smooth
hair. Give the F1 and F2 genotypic and phenotypic ratios of a cross of a smooth, white guinea pig with
a homozygous, rough, yellow guinea pig. What will be an ideal response?


F1: rough cream Yy Rr; F2: 3 YY R_ yellow rough, 6 Yy R_ cream rough, 3 yy R_ white rough, 1 YY rr
yellow smooth, 2 Yy rr cream smooth, 1 yy rr white smooth

Biology & Microbiology

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