Answers Fall 24 GSE Biology A ICLab: Mouse Genetics (Two Traits)

Lab: Mouse Genetics (Two Traits) Answers

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Notice that the predicted percentages and laboratory percentages are not the same. These differences most likely result from .

a computation error

a strong linkage between the genes

expected randomness

an unusual sample

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

black fur, red eyes

black fur, black eyes

white fur, black eyes

white fur, red eyes

Black Fur and Black Eyes Black Fur and Red Eyes White Fur and Black Eyes White Fur and Red Eyes Predicted Fraction ⇒ 4/16 ⇒ 4/16 ⇒ 4/16 ⇒ 4/16

Answers:

⇒ 4:9

⇒ 4:3

⇒ 4:1

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

short, black fur

long, black fur

short, brown fur

long, brown fur

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

The genes for eye color and body color are located on the same chromosome.

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.

. . . the genes assort independently.

short, black fur

long, black fur

short, brown fur

long, brown fur

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