Quiz 36: Independent Assortment & Sex-Linked Traits

L26

Which statement regarding Incomplete Dominance is false?

a. The F1 generation of a cross involving a trait that exhibits incomplete dominance will display an intermediate phenotype for that particular trait.

b. The F1 generation of a cross involving a trait that exhibits incomplete dominance will show the dominant phenotype for that particular trait.

c. Some of the F2 generation of a cross involving a trait that exhibits incomplete dominance will display phenotypes that resemble the P(parental) generation.

d. Some of the F2 generation of a cross involving a trait that exhibits incomplete dominance will display phenotypes that resemble the F1 generation.

b. The F1 generation of a cross involving a trait that exhibits incomplete dominance will show the dominant phenotype for that particular trait.

Mendel's Principle of Independent Assortment states that

a. the formation of gametes leads to the equal separation of alleles for a particular gene into the sperm and eggs

b. the formation of gametes leads to the unequal separation of alleles for a particular gene into the sperm and eggs

c. the two alleles of a particular gene segregate into gametes independently of the two alleles of another gene.

d. the two alleles of a particular gene segregate into gametes in a manner that depends on the segregation of the two alleles of another gene.

c. the two alleles of a particular gene segregate into gametes independently of the two alleles of another gene.

Consider a pea plant mating in which the yellow seed phenotype is dominant to green seeds and round seeds is dominant to wrinkled seeds. What would the phenotypic ratio be for an F1 generation pea plant whose female parent plant was true-breeding for yellow/wrinkled seeds and male parent plant was true-breeding for green/round seeds?

a. 1:1:1:1; yellow, round; yellow, wrinkled; green, round; green,wrinkled

b. 9:3:3:1; yellow, round; yellow, wrinkled; green, round; green,wrinkled

c. All the plants will have yellow, round seeds.

d. All the plants will have green, wrinkled seeds.

All the plants will have yellow, round seeds.

T/F: During epistasis, the expression of one gene alters the expression of a different gene.

True

In the Thomas Hunt Morgan fruit fly experiment, the mating of a true-breeding red-eyed female (dominant) with a true-breeding white-eyed male (recessive) in the parental generation resulted in

a. males with red eyes and females with white eyes.

b. males with white eyes and females with red eyes.

c. males and females with white eyes.

d. males and females with red eyes.

d. males and females with red eyes.

During normal segregation of the sex chromosomes in female meiosis, the resulting egg cells

a. only contain one X-chromosome.

b. only contain one Y-chromosome.

c. contain one X and one Y chromosome.

d. contain neither an X nor a Y chromosome.

a. only contain one X-chromosome.