The ABO blood group assorts independently of the rhesus ...

Question

The ABO blood group assorts independently of the rhesus (Rh) blood group and both assort independently of the MN blood group. Three alleles, I^A, I^B and i, occur at the ABO locus. Two alleles, R, a dominant allele producing Rh+, and r, a recessive allele for Rh-, are found at the Rh locus, and codominant alleles M and N occur at the MN locus. Each gene is autosomal.

A man with blood types B, Rh+, and N says he could not be the father of a child with blood types O, Rh−, and MN. The mother of the child has blood types A, Rh+, and MN. Is the man correct? Explain.

Accepted Answer

Hey, everyone. Let's take a look at this question together in a population. How many different blood group phenotype are predicted based on the A B O and Rh blood group systems. So let's recall what we know about the different phenotype found in the A B O and Rh blood group systems to figure out how many different blood group phenotype. So we could have, so we know that in the A B O blood group system, we can have A B A B as well as oh and in the R H blood group system, we can have our H positive as well as R H negative. And so when we have these two blood group systems and we combine them, we can have the following phenotype sis as a positive, be positive. A negative B negative A B positive A B negative and then O positive and lastly O negative, which means we can have a total of 1234567, eight different phenotype. So based on the A B O and Rh blood group systems, which means that answer choice D is the correct answer because we know that in the A B O blood group system, we have those four. And in the Rh blood group system, we can have either positive or negative. So when we use the Rh system, in relation to the A B O, we can have a positive and negative for each A B O blood group phenotype, which means we have a total of eight different phenotype. So answer choice D is the correct answer. I hope you found this video to be helpful. Thank you and goodbye.

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