Lab: Mouse Genetics (One Trait) Answers

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

In steps 4 and 5, you reversed the process. You were shown the parents and offspring above. You did a experimental cross✔ test crosscross breed to identify the genotypes of the parents

When you combine two of these alleles, the resulting genotype is bbBBBb; therefore, the resulting offspring have white fur.

You confirmed the above in steps 1 through 3, in which you changed the ✔ genotypesphenotypesinheritance of the

In general, did the simulated mice align with your predictions from the Punnett squares? ✔ YesNo

If you crossed two mice with white fur, what distribution of fur color would you expect in the offspring?

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.

Justify your answer by filling in the blanks. Both parents have white fur. OneThe most likelyThe only

In the cross Bb x Bb (two heterozygous mice), what percentage of the offspring would you predict to have the same phenotype as the parents?

There are genes that govern the eye color of mice, too. Suppose that a true-breeding mouse with red eyes is crossed with a true-breeding mouse with black eyes. All of the offspring mice have black eyes. What can you conclude? The allele for red eyes is dominant.The allele for black eyes is dominant.Neither. You need more data.

25%50%✔ 75%100%

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

You confirmed the above in steps 1 through 3, in which you changed the ✔ genotypesphenotypesinheritance of the

In general, did the simulated mice align with your predictions from the Punnett squares? ✔ YesNo

If you crossed two mice with white fur, what distribution of fur color would you expect in the offspring?

Justify your answer by filling in the blanks. Both parents have white fur. OneThe most likely✔ The only

In the cross Bb x Bb (two heterozygous mice), what percentage of the offspring would you predict to have the same phenotype as the parents?

There are genes that govern the eye color of mice, too. Suppose that a true-breeding mouse with red eyes is crossed with a true-breeding mouse with black eyes. All of the offspring mice have black eyes. What can you conclude? The allele for red eyes is dominant.The allele for black eyes is dominant.Neither. You need more data.

25%50%✔ 75%100%