ANS 2- 7.02 (Part 1)

Using the Punnet Square, what percent of calves would have horns if a homozygous polled (PP) bull were crossed with a homozygous polled (PP) cow?

• 0

• 25

• 75

• 100

In livestock, sex-linked traits are often recessive and are covered up by:

• dominant genes.

• female hormones.

• male hormones.

• recessive genes.

Based on the Punnet Square, what percent of the calves would have horns if a bull with heterozygous genes for horns (Pp) were mated with a cow with heterozygous genes for horns (Pp)?

• 0

• 25

• 75

• 100

In livestock, the traits on the portion of the Y chromosome that do not link with the X chromosome are transmitted only from:

• father to daughter.

• father to son.

• mother to daughter.

• mother to son.

A polled bull bred to a polled cow that produces a calf that has horns is an example of:

• meiosis.

• mitosis.

• purebred breeding.

• recessive genes.

The gene in a pair that hides the effect of the other gene is a:

• dominant gene.

• homozygous gene pair.

• Punnett square.

• recessive gene.

A gene pair that carries two genes for the same trait is:

• blood-typing.

• expected progeny difference.

• heterozygous.

• homozygous.

Using the Punnet Square, what percent of the offspring would be black if a white heterozygous (Ww) boar is bred to a white heterozygous (Ww) sow?

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• 25

• 50

• 100

For a cow to have horns, the gene pair must be:

• crossbred.

• dominant.

• heterozygous and dominant.

• recessive and homozygous.

Based on the Punnet Square, what percent of calves would have horns if a bull with homozygous dominant genes for polled (PP) were mated with a cow with homozygous recessive genes for horned (pp)?

• 0

• 25

• 50

• 100