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An example of a(n) ______ cross is the mating of two rats that both have the genotype Ff Tt for fur color and tail length to examine which of two fur colors and tail lengths their offspring will have.

Question

An example of a(n) ______ cross is the mating of two rats that both have the genotype Ff Tt for fur color and tail length to examine which of two fur colors and tail lengths their offspring will have.

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Solution

The blank in the sentence should be filled with "dihybrid". The sentence should read: "An example of a dihybrid cross is the mating of two rats that both have the genotype Ff Tt for fur color and tail length to examine which of two fur colors and tail lengths their offspring will have."

A dihybrid cross is a breeding experiment that tracks the inheritance of two traits at once. In this case, the two traits being tracked are fur color and tail length. The genotype "Ff Tt" indicates that each rat has two different alleles (versions of a gene) for each trait: one dominant (represented by the capital letter) and one recessive (represented by the lowercase letter). The combination of these alleles determines the rat's phenotype, or physical appearance.

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