In rabbits, black hair depends on a dominant allele, B, and brown...

Question

In rabbits, black hair depends on a dominant allele, B, and brown hair on a recessive allele, b. Short hair is due to a dominant allele, S, and long hair to a recessive allele, s. If a true-breeding black short-haired male is mated with a brown long-haired female, describe their offspring. What will be the genotypes of the offspring? If two of these F1 rabbits are mated, what phenotypes would you expect among their offspring? In what proportions?

Accepted Answer

Hello everyone and welcome to today's video. So if using opponent square, we can predict that 50% of the offspring is homocide is dominant or uppercase T. T. And 50% is heterocyclic or one uppercase T. One lower case C. What is the possible genotype of the two parents? So this is the type of reverse punnett square. So let's set up the point square and visualize what is happening here. We have that 50% of the offspring is homicide. Was dominant or tea T. And 50% is heterocyclic or T. See as we see here. So what is the genotype of these parents? Well, we have that every single one of our organisms contains these dominant a leo. So let's set that up up here and let's get rid of that dominant in each of these organisms as we already accounted for it. So, what we're left with is that the only possibility of having in this role too dominant a leo's is to have a dominant a leo here. And the only way that we can have two recessive helios here is if we have a recessive aaliyah here. So by doing that, we can get rid of all Of our genotype is here. We fulfilled all of the requirements. So we have that at the top we have a homo six dominant parents. And at the bottom we have a heterocyclic parents, which is going to be represented by answer choice A. We have a homosexual as dominant as we see here. And a hetero cycles parent. That is the only way that we can get. 50% homo cycles dominant and 50% hetero sagas in our punnett square. So I really hope this video helped you, and I hope to see you on the next one.

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