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Unit 5.2 Test (Remediation)

Last updated over 1 year ago

5 questions

LT 5.2 Dihybrid Crosses

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Question 1

1.

In rabbits, white fur (W) is dominant to black (w), and long ears (E) are dominant to short ears (e). A breeder mates two rabbits that are heterozygous (WwEe) for both traits. What is the chance that the offspring will be black with long ears?

3/16

1/8

1/4

1/16

Question 2

2.

In pea plants tall (T) is dominant to short, and axial (A) is dominant to terminal. A tall pea plant with terminal flowers (flowers on the end of the stems) is crossed with a short pea plant that has axial flowers (flowers in the middle of the stems). All 72 offspring are tall with axial flowers. What are the genoytpes of the parents in the cross?

TtAA x TTAa

TTAA x ttaa

TTaa x ttAA

TtAa x TtAa

Question 3

3.

In mice, black fur is dominant over white fur, and black eyes are dominant over red eyes. Which of the following is possible?

Two parent mice with black fur and black eyes have offspring with white fur and red eyes.

Two parents with black fur and red eyes have offspring with white fur and black eyes.

None of the above are possible 

Two parents with white fur and red eyes have offspring with black fur and black eyes.

Question 4

4.

In guinea pigs, black hair (B) is dominant to brown hair (b) and short hair (H) is dominant to long hair (h). A black, long-haired guinea pig (Bbhh) is crossed with a brown, short-haired guinea pig (bbHh). What percentage of the offspring will be black with long hair?

25

75

50

100

Question 5

5.

In pea plants tall (T) is dominant to short, and axial (A) is dominant to terminal. A tall pea plant with terminal flowers (flowers on the end of the stems) is crossed with a short pea plant that has axial flowers (flowers in the middle of the stems). All 72 offspring are tall with axial flowers. What are all the possible gametes of the parents in the cross?

TA, tA, ta

TA, ta

TA, Ta, tA, ta

Ta, tA