Five human matings (1–5), identified by both maternal and paterna...

Question

Five human matings (1–5), identified by both maternal and paternal phenotypes for ABO and MN blood-group antigen status, are shown on the left side of the following table:

Parental Phenotypes Offspring
(1) A, M x A, N (a) A, N
(2) B, M x B, M (b) O, N
(3) O, N x B, N (c) O, MN
(4) AB, M x O, N (d) B, M
(5) AB, MN x AB, MN (e) B, MN

Each mating resulted in one of the five offspring shown in the right-hand column (a–e). Match each offspring with one correct set of parents, using each parental set only once. Is there more than one set of correct answers?

Accepted Answer

Hello everyone and welcome to today's video. So a female with Type A. Amen blood marys Amen with Tybee and blood identify the proportion of the offspring that will have Type A B and M. And blood. Well, the way that we're going to go about this is that we're going to create punnett squares for each of these Jenna types. And then we're going to use this word and to simply multiply the two probabilities in order to get the total or choose the probability of obtaining type A B. And M. And blood. And this is how we're going to do it. First of all, we're going to be identifying the probability of obtaining these M. And blood. So the female has type M. And and that's going to be the genotype. All the men has type M. So it is a homo sagas genotype. Once we do this cross, We're going to see that there is a 1/ chance of obtaining this type Mn blood according to this planet square. Now, let's do the same thing for the actual blood types in this case, the female is type A. Which is going to be given by the following and the man is type. Once we do this cross, we're going to see that this is what we're getting. As we can see there is only one type A B. Here in the entire planet Square. So it is going to be a 1/4 probability of obtaining this type A B. In the offspring. Now, like we said, we're going to multiply these two probabilities because this is what the problem is stating, and that is going to yield a probability of obtaining offspring with Type A B and M. And blood of 1/8 which is going to be answer choice C. I really hope this video helped you, and I hope to see you on the next one.

Key Concepts

ABO Blood Group System

MN Blood Group System

Punnett Square and Genetic Crosses

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