In guinea pigs, rough coats (with lots of swirly cowlicks) are dominant over smooth coats. If a male homozygous dominant guinea pig is crossed with a female heterozygous guinea pig, what are the possible genotypes and phenotypes of the offspring? Complete the Punnett square and the percentages of rough and smooth coated offspring.

***Please follow all Punnett square rules to complete this question. (Letters and numbers, only)

Please use the following: Rough = R and Smooth = r


offspring 1 offspring 2
offspring 3 offspring 4

% rough

% smooth



Blank 1:
Blank 2:
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Blank 1: R

Blank 2: r
Blank 3: Rr
Blank 4: Rr
Blank 5: 100%
Blank 6: 0%
Blank 7: Rr
Blank 8: Rr
Blank 9: 50%
Blank 10: 50%