Lab: Mouse Genetics (Two Traits)

Question 1

The hypothesis would not have been supported by the data if

Revolt · Accepted Answer

the traits for white fur and red eyes were always inherited together.

Question 2

A cross was performed, and the offspring shown to the right were produced. What is the most likely genotype for the parents?

Revolt · Accepted Answer

BbEe × BbEe

Question 3

Select all the offspring phenotypes that could be produced from a BbEE x bbee cross (shown above).

Revolt · Accepted Answer

black fur, black eyes; white fur, black eyes

Question 4

Cross a parent that is homozygous recessive for both traits (bbee) with a dihybrid (BbEe). First, draw a Punnett square in your notes. For each offspring in the Punnett square, determine the phenotype.In other words, what are the fur color and eye color? Finally, use that information to fill in the predicted fraction of each phenotype in the data table below.

Revolt · Accepted Answer

4

Question 5

. . . the genes are nearby on the same chromosome.

Revolt · Accepted Answer

short, black fur; long, brown fur

Question 6

Which explanations best explain the data? Check all that apply.

Revolt · Accepted Answer

The genes for wing shape and body color are located on the same chromosome.; The genes for eye color and wing shape are on different chromosomes.

Question 7

. . . the genes assort independently.

Revolt · Accepted Answer

short, black fur; long, black fur; short, brown fur; long, brown fur

Lab: Mouse Genetics (Two Traits) Answers

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