The ABO and MN blood groups are shown for four sets of p...

Question

The ABO and MN blood groups are shown for four sets of parents (1 to 4) and four children (a to d). Recall that the ABO blood group has three alleles: I^A, I^B and i. The MN blood group has two codominant alleles, M and N. Using your knowledge of these genetic systems, match each child with every set of parents who might have conceived the child, and exclude any parental set that could not have conceived the child. <>

Accepted Answer

Hi, everyone. Let's look at our next problem. It says the A B O blood group consists of three alleles, namely capital I superscript, A capital I superscript B and little I, which of the following Jenna types can produce blood type O. But we need to recall from our content video that capital I A and capital I B are co dominant alleles and they're both dominant. Too little I which is the recessive. Oh Yeah, Leo. So when we look through our answer choices and we're looking for which genotype produces blood type O, we need to recall that O is the one recessive blood type essentially because it's an absence of the A and B antigens. So if either an alibi for either A or B is present, those antigens will be presented on the surface of the cell. When they're both missing, there's no antigens on the surface of the cell. And we described that as blood type O. So let's look at our answer choices. Choice A says capital I superscript a little I. Well, this will produce blood type A since A, the A allele is dominant a little little I, we have an alley for blood type A and that is the blood type. So choice A is incorrect. Choice B is capital I superscript be little. I. Well, similar to how blood type A worked. This gives blood type B since B is dominant, capital I B is dominant, too little. I, so not our answer. Choice. Choice C is little I little I. Well, this will be our correct answer because blood type O is the recessive blood type based on an absence of either the A or B A little. And then finally, let's look at choice D which has capitalized superscript day, capitalize superscript B because these two aloes are co dominant that leads to blood type A B, the cells present both A and B antigens on their surface and the person has this co dominant blood type. So choice D is incorrect. So again, which of the following Jenna types produced blood type O? Choice C little I little. I see you in the next video.

Key Concepts

ABO Blood Group System

MN Blood Group System

Punnett Square and Genetic Prediction

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