Biology 110 Review 2

Purple flowers are dominant over white flower colour. What do you get if you cross a true breeding purple x white?

• 100% purple

• 75% purple, 25% white

• 50% purple, 50% white

• 100% white

Purple flowers are dominant over white colour for flowers. What will you get from a heterozygous purple x white cross?

• 100% purple

• 75% purple, 25% white

• 50% purple, 50% white

• 100% white

In peas, green colour is dominant to yellow. What do you get if you cross 2 heterozygous green pea plants?

• 100% green

• 75% green, 25% yellow

• 50% green, 50% yellow

• 100% yellow

If you cross a plant with red flowers and a plant with white flowers, you get offspring plants that have red spotted flowers. What is this relationship called?

• Incomplete dominance

• Co-dominance

• Epistasis

• Pleiotropy

One parent has blood type A and the other is blood type B, can they have a blood type O child?

• yes

• no

One parent has blood type AB, and one parent has blood type O, can they have a blood type O child?

• yes

• no

Polygenic inheritance example:

• Dogs with yellow fur even though they have the alleles for black fur.

• The large variation seen in human heights.

• Red x white flowering plants giving pink flowered offspring

• The variation seen in human skin tone

Fathers can pass Xlinked alleles to daughters.

• true

• false

For Xlinked traits, a carrier female can pass the trait to half of all children if the father is unaffected.

• true

• false

Calico (patchy orange and black) cats display:

• heterozygosity and X inactivation

• homozygosity and X inactivation

• epistasis (recessive)

• pleiotropy