ANS 2- 7.02 (Part 2)

A gene pair that carries two different genes that affect a trait is:

• blood-typing.

• heterozygous.

• homozygous.

• pure-breeding.

The gene in a pair that is hidden by the other gene is a:

• dominant gene.

• homozygous gene pair.

• phenotype gene.

• recessive gene.

After meiosis, one half the sperm carry an X chromosome, one half carry a Y chromosome, and all the ova carry an X chromosome. The chromosome combination that produces a male offspring in mammals is:

• X.

• XX.

• XY.

• YY.

The situation in which one gene does not completely hide the effect of the other gene in a gene pair is:

• dominant.

• homozygous.

• incomplete dominance.

• recessive.

If a polled cow bred to a polled bull produces a calf with horns, the parents’ genotypes are:

• dominant.

• heterozygous.

• homozygous.

• purebred.

If black is dominant over red and white faces are dominant over colored faces in cattle, what color offspring would come from crossing a purebred black Angus bull with a purebred white-faced, red Hereford cow?

• Black all over

• Black with white face

• Red all over

• Red with white face

The appearance of a new trait in the biological offspring that is not in the genetic makeup of the parents is a:

• dominant gene.

• mutation.

• recessive gene.

• sex-linked trait.

Using the Punnet Square, what percent of the offspring would be white if a dominant white homozygous (WW) boar is bred to a black recessive homozygous (ww) sow?

• 0

• 25

• 75

• 100

The tendency for genes that are located close together on the chromosome to stay together and pass traits in groups is:

• crossover.

• incomplete dominance.

• linkage.

• mutation.