Genetics Practice. Incomplete Dominance In carnations, red and white phenotypes have homozygous genotypes. The heterozygous genotype makes a pink phenotype.

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Presentation transcript:

Genetics Practice

Incomplete Dominance In carnations, red and white phenotypes have homozygous genotypes. The heterozygous genotype makes a pink phenotype. Cross a red carnation with a pink carnation. What percent of the offspring will be pink?

Codominance In cattle, roan coat color (red and white hairs) occurs in heterozygotes. Cross a white cow with a roan cow.

Sex-Linked Colorblindness is a sex-linked recessive disorder. If a male that is color-blind marries a woman that is heterozygous, what are the possibilities for their offspring?

If a man without colorblindness marries a woman that is heterozygous, what is the likelihood that their sons will be normal?

Baldness is a sex-linked dominant condition. If a female who is not bald weds a man who is bald, what is the likelihood that they will produce a daughter that is not bald?

Multiple Alleles If a woman that is heterozygous type A blood weds a man who is heterozygous type B blood, what are the possible genotypes of their offspring?

A couple has two children—one has type A blood and the other has type O blood. What are the possible genotypes of the couple?