Monohybrid Practice Problems

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Presentation transcript:

Monohybrid Practice Problems Two mice are both heterozygous for eye color. Determine the genotype and phenotype fractions of their children. E= black eyes e= red eyes

Problem # 1 Silkworms C= yellow cocoon c = white cocoon Parents CC x cc What is the percent chance of having a heterozygous offspring?

Problem # 2 Sleeping Beauty has freckles. Her prince charming is heterozygous for no freckles. F= no freckles f= freckles What is the fraction chance of having a child with no freckles?

Problem # 3 Sponge Bob Square pants is heterozygous for brown eyes. Sandy is also heterozygous for brown eyes. B= brown eyes b=blue eyes List the different fraction probabilities of genotypes for their children.

Problem # 4 Daffy Duck is heterozygous for black feathers. Daisy Duck is homozygous for yellow feathers. B = Black b = yellow What is the ratio of black to yellow feathers for their children?

Problem #5 A heterozygous tall pea plant is crossed with a homozygous tall pea plant. T= tall t= short What percentage of the offspring will be short?

Problem # 6 For eye color, brown eyes (B) is dominant over blue eyes (b). A man that has blue eyes marries a woman that is heterozygous for brown eyes. What is the fraction probability of the possible phenotypes for the children?

Problem #7 A man who is heterozygous for being able to roll his tongue marries a woman who is recessive for not rolling her tongue. T= tongue roller t= non-roller List all of the genotype and phenotype fraction probabilities for their children.