Organisms with the genotypes AABbCcDd and AaBbCcDd are c...

Question

Organisms with the genotypes AABbCcDd and AaBbCcDd are crossed. What are the expected proportions of the following progeny?

a phenotype identical to either parent

Accepted Answer

Everyone. Let's take a look at this question together. What is the expected ratio of little X little X little Y little Y offspring from the cross between big X little X, big, Y little Y and big X little X big Y little Y. Is it answer choice? A 1/4 answer choice, B one A answer choice, C 1/16 or answer choice D 3/16. Let's work this problem out together to try to figure out which of the following answer choices is the correct answer. So here we have a cross between two genotypes that are heterozygous for both the X and Y traits. And we want to find out the expected ratio of the offspring being homozygous recessive for both traits. And we know that homozygous recessive ratio in a cross between to heterozygous genotypes is one out of four. And so knowing this, we know that the probability of the homozygous recessive or X is one out of four as well as the probability of the homozygous recessive or Y is also one out of four, which means that the probability of the homozygous recessive for both X and Y is one out of four, multiplied by one out of four, which equals one out of 16. And so the probability of producing an offspring that is homozygous recessive or both X and Y is one out of 16, which is answer choice. C the correct answer because the homozygous recessive ratio in a cross between two heterozygous genotypes is one out of four. And since we have a cross between heterozygous genotypes or two traits, we know that the probability of that homozygous recessive for XN for Y is one out of four for each individually and when combined is one out of 16. So answer choice, C one out of 16 is the correct answer. I hope you found this video to be helpful. Thank you and goodbye.

Struggling with Genetics?

Organisms with the genotypes AABbCcDd and AaBbCcDd are crossed. What are the expected proportions of the following progeny?

a phenotype identical to either parent

Watch next

Understanding Independent Assortment practice set

Struggling with Genetics?

Organisms with the genotypes AABbCcDd and AaBbCcDd are crossed. What are the expected proportions of the following progeny?a phenotype identical to either parent

Watch next

Understanding Independent Assortment practice set

Organisms with the genotypes AABbCcDd and AaBbCcDd are crossed. What are the expected proportions of the following progeny?

a phenotype identical to either parent