Biology 1 B - Lab: Mouse Genetics (One Trait) - Assignment 100%

If you crossed two mice with white fur, what distribution of fur color would you expect in the offspring? about 50% black and 50% white about 75% black and 50% white 100% white 100% black Justify your answer by filling in the blanks. Both parents have white fur. (Choices: One, The most likely, The only) way that this can happen is if their genotypes are both (Choices: bb, BB, Bb) Therefore, both parents pass the (Choices: B, b, bb) allele to every offspring. When you combine two of these alleles, the resulting genotype is (Choices: bb, BB, Bb) therefore, the resultingoffspring have white fur.

100% white Both parents have white fur. THE ONLY way that this can happen is if their genotypes are both (bb) Therefore, both parents pass the (b) allele to every offspring. When you combine two of these alleles, the resulting genotype is (bb) therefore, the resulting offspring have white fur.

Sickle cell anemia is a genetic disease caused by a recessive allele. Sickle cell anemia affects the hemoglobin in red blood cells, making them the shape of crescents instead of disks. The disease can cause pain and damage blood vessels. A genetic counselor meets with a man and a woman that both are carriers of sickle cell anemia. Carriers have one copy of the sickle cell allele and one copy of the allele for making normal hemoglobin. What is the probability that the couple would have a child that was also a carrier for sickle cell anemia? 0% 25% 50% 75% 100%

50%

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? 0% 25% 50% 75% 100% Next, you perform a cross with a mouse with black fur and a mouse with white fur. Which result(s) for the offspring would indicate that the mouse with black fur was heterozygous? 4 mice with black fur 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

75% 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

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. 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. To do so, you would do a (Choices: test cross, simulation, Punnett square) Breed them and look for approximately a (Choices: 100% to 0%, 75% to 25%, 50% to 50%, 25% to 75%, 0% to 100%) ratio of black eyes to red eyes.

The allele for black eyes is dominant. To do so, you would do a TEST CROSS. Breed them and look for approximately a (50% to 50%) ratio of black eyes to red eyes.

In general, did the simulated mice align with your predictions from the Punnett squares? (Choices: Yes, No) Error Analysis: What might be the reason that some of your percentages didn't exactly match your predicted results? Gametes aren't responsible for inheritance. Mice don't have large litters, so the sample size was not large enough. The wrong type of mice were used. If you did the experiment again, how could you improve upon the experimental design? Check all that apply. Increase the number of mice bred. Examine a different trait within mice. Examine a trait in another species. Test patterns for future generations.

Yes Mice don't have large litters, so the sample size was not large enough. Increase the number of mice bred. Examine a different trait within mice. Examine a trait in another species. Test patterns for future generations.

You confirmed the above in steps 1 through 3, in which you changed the ________ of the (Choices: genotypes, phenotypes, inheritance) parents and predicted the fur color, or _______, of the offspring. (Choices: genotypes, phenotypes, inheritance) In steps 4 and 5, you reversed the process. You were shown the parents and offspring above. You did a experimental _______ to identify (Choices: experimental cross, test cross, cross breed) the genotypes of the parents.

You confirmed the above in steps 1 through 3, in which you changed the GENOTYPES of the parents and predicted the fur color, or PHENOTYPES of the offspring. In steps 4 and 5, you reversed the process. You were shown the parents and offspring above. You did a TEST CROSS to identify the genotypes of the parents.

Your prediction is that (Choices: 25%, 50%, 75%, 100%) of the offspring would have the dominant phenotype, and (Choices: 0%, 25%, 50%, 75%) of the offspring would have the recessive phenotype.

Your prediction is that 75% of the offspring would have the dominant phenotype, and 25% of the offspring would have the recessive phenotype.