Lab: Mouse Genetics (One Trait)

Question 1

What is the probability that the couple would have a child that was also a carrier for sickle cell anemia?

Revolt · Accepted Answer

50%

Question 2

Error Analysis: What might be the reason that some of your percentages didn’t exactly match your predicted results?

Revolt · Accepted Answer

Mice don’t have large litters, so the sample size was not large enough.

Question 3

way that this can happen is if their genotypes are both bbBBBb.

Revolt · Accepted Answer

bb

Question 4

To do so, you would do a test crosssimulationPunnett square. Breed

Revolt · Accepted Answer

test cross; Suppose that you had a male mouse with black eyes and a female mouse with red eyes. You know that the allele for black eyes is dominant, and you want to determine whether the male is heterozygous.: test cross; Suppose that you had a male mouse with black eyes and a female mouse with red eyes. You know that the allele for black eyes is dominant, and you want to determine whether the male is heterozygous.: 50% to 50%

Question 5

You make a Punnett square for a cross and find the results shown below. A Punnett square is shown. The columns are labeled Upper X and x for male. The rows are labeled Upper X and x for female. Clockwise from upper left the boxes contain: Homozygous dominant, Heterozygous, Homozygous recessive, heterozygous.

Revolt · Accepted Answer

25%

Question 6

parents and predicted the fur color, or genotypes✔ phenotypesinheritance, of the offspring.

Revolt · Accepted Answer

✔ phenotypes

Question 7

Error Analysis: What might be the reason that some of your percentages didn’t exactly match your predicted results?

Revolt · Accepted Answer

Mice don’t have large litters, so the sample size was not large enough.

Question 8

Next, you perform a cross with a mouse with black fur and a mouse with white fur. Which result(s) for the offspring would confirm that the mouse with black fur was heterozygous?

Revolt · Accepted Answer

8 mice with black fur, 1 mouse with white fur; 5 mice with black fur, 6 mice with white fur; 6 mice with black fur, 2 mice with white fur

Question 9

Suppose that you had a male mouse with black eyes and a female mouse with red eyes. You know that the allele for black eyes is dominant, and you want to determine whether the male is heterozygous.

Revolt · Accepted Answer

✔ test cross; Suppose that you had a male mouse with black eyes and a female mouse with red eyes. You know that the allele for black eyes is dominant, and you want to determine whether the male is heterozygous.: test cross; Suppose that you had a male mouse with black eyes and a female mouse with red eyes. You know that the allele for black eyes is dominant, and you want to determine whether the male is heterozygous.: 50% to 50%

Question 10

Therefore, both parents pass the Bbbb allele to every offspring.

Revolt · Accepted Answer

b

Lab: Mouse Genetics (One Trait) Answers

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