Punnett square problems

Punnett square problems - Name _ Date: _ Period: _ Genetics...

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Name ____________________________________________ Date: _____________ Period: ______ Genetics Problems Monohybrid practice problems 1. The contrasting traits for hair color in guinea pigs are black (B) and white (b). What are the genotype pairs for hair color? 2. In humans, albinism (a lack of pigment in the skin, eyes, and hair) is due to a homozygous recessive condition. a. Write the genotype pairs for this condition. b. Write the possible pairs that normal-colored people have. 3. Which of the following genotypes are heterozygous? AA, Aa, Yy, Rr, RR 4. Green is the dominant color for pods of pea plants. Yellow is recessive. What are the phenotypes of the following allele pairs? GG, Gg, gg 5. In a pea plant that breeds true for tall, what possible gametes can be produced? 6. In a pea plant that breeds true for dwarf, what possible gametes can be produced? 7. Use a punnett square to determine the possible genotypes of the F 1 generation when a heterozygous black rabbit is crossed with a homozygous brown rabbit. (Black hair is dominant to brown hair in rabbits.) 8. White hair is dominant over black hair in sheep. A white male and a black female are parents of a black lamb. What is the probability that their next lamb will be white?
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This note was uploaded on 04/05/2011 for the course BIOL 2112 taught by Professor Deidra during the Spring '11 term at CSU Sacramento.

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Punnett square problems - Name _ Date: _ Period: _ Genetics...

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