What is the probability that a child of the parents, whose blood types are AB andB, will have B blood type?

Name: What is the probability that a child of the parents, whose blood type
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Description: What is the probability that a child of the parents, whose blood types are AB andB, will have B blood type?

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Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter8: Patterns Of Inheritance

Section: Chapter Questions

Problem 18CTQ: Could an individual with blood type O (genotype ii) be a legitimate child of parents in which one...

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Question

What is the probability that a child of the parents, whose blood types are AB and
B, will have B blood type?

Expert Solution

Introduction

ABO blood grouping system is the most common type of blood grouping system used. It was discovered by Karl Landsteiner.

Therefore, ABO blood grouping has 6 genotypes and 4 phenotypes

i^A and i^B dominant over i. i is only expressed when in recessive conditions. When i^A and i^B are present together, they show codominance.

Solution

The parents have blood type AB and B.

There are two possible genotypes for the parent with the B blood group. Therefore there will be two separate crosses.

Cross 1:

i^AiB x i^Bi

Probability of having a child with blood group B = 1/2

Cross 2:

i^Ai^B x i^Bi^B

Probability of having a child with blood group B = 1/2

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