Independent Assortment

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Animation: Principle of independent assortment

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Animation Assessment

Question 1 of 5

The principle of independent assortment holds that:

Question 1 choicesChoice A., in heterozygotes, half the gametes will get one allele, and the other half will get the second allele.Choice B., the pattern of inheritance of one trait does not influence the pattern of inheritance of another trait.Choice C., during fertilization, haploid gametes join to create a diploid zygote.Choice D., in heterozygotes, the phenotype will be determined by the dominant allele.

Correct.

Incorrect.

Question 2 of 5

For an individual who is heterozygous for two genes, Aa and Bb, what does independent assortment predict?

Question 2 choicesChoice A., Offspring inheriting the dominant (A) allele of the first gene are equally likely to inherit either the dominant (B) or the recessive (b) allele of the second gene.Choice B., Offspring inheriting the dominant allele (A) of the first gene will also inherit the dominant (B) allele of the second gene.Choice C., Offspring inheriting the recessive allele (a) of the first gene will inherit the dominant allele (B) of the second gene.

Correct.

Incorrect.

Question 3 of 5

In a cross between two individuals who are heterozygous for two traits determined by dominant and recessive alleles (Aa Bb), what is the expected ratio of offspring for the trait determined by the first gene (Aa)?

Question 3 choicesChoice A., 9:3:3:1Choice B., 3:1Choice C., 1:1Choice D., 12:4:4:1

Correct.

Incorrect.

Question 4 of 5

In a cross between two individuals who are heterozygous for two traits determined by dominant and recessive alleles (Aa Bb), what is the expected ratio of phenotypes for the traits determined by both genes?

Question 4 choicesChoice A., 9:3:3:1Choice B., 3:1Choice C., 1:1Choice D., 12:4:4:1

Correct.

Incorrect.

Question 5 of 5

When a 9:3:3:1 ratio of phenotypes is produced by a cross between two individuals, which phenotypes are present in the rarest class that is represented by only 1 of the 16 possible genotypes of offspring?

Question 5 choicesChoice A., These offspring have the dominant phenotype of both traits.Choice B., These offspring have the dominant phenotype of one trait and the recessive phenotype of the other trait.Choice C., These offspring have the recessive phenotype of both traits.

Correct.

Incorrect.

Assessment Summary

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