1. Red-green colorbilindness is caused by a recessive allele ) at an X-linked gene, and albinism is caused by a recessive allele (a) at an autosomal gene. A phenotypically normal woman (Sara) has a father who is colorblind, and she knows that she is a carrier for albinism. She plans to have a child with a colorblind man (Abdul) who is also a carrier for albinism. What is the probability that Sara and Abdul's child will have one of the conditions, but not both?: Follow the steps below to answer this question. a) What is the cross? b) What are the target genotypes? Note: it might be useful to come back to this one and double- check it after you have completed step c, below. ) Break this down to the single gene level by answering the following questions: a What is the proportion of normal to albino offspring? Show the Punnett square: b. What is the proportion of normal to colorblind offspring? Show the Punnett square:

Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN:9781305251052
Author:Michael Cummings
Publisher:Michael Cummings
Chapter4: Pedigree Analysis In Human Genetics
Section: Chapter Questions
Problem 17QP: Analysis of X-Linked Dominant and Recessive Traits A young boy is color-blind. His one brother and...
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1. Red-green colorblindness is caused by a recessive allele (X) at an X-linked gene, and albinism is
caused by a recessive allele (a) at an autosomal gene. A phenotypically normal woman (Sara) has a
father who is colorblind, and she knows that she is a carrier for albinism. She plans to have a child
with a colorblind man (Abdul) who is also a carrier for albinism. What is the probability that Sara and
Abdul's child will have one of the conditions, but not both?
Follow the steps below to answer this question.
a) What is the cross?
b) What are the target genotypes? Note: it might be useful to come back to this one and double-
check it after you have completed step c, below.
c) Break this down to the single gene level by answering the following questions:
a. What is the proportion of normal to albino offspring? Show the Punnett square:
b. What is the proportion of normal to colorblind offspring? Show the Punnett square:
d) What is the probability that Sara and Abdul's child will have one of the conditions, but not
both? Show your work, including the probability of getting each target genotype and the total
probability.
Transcribed Image Text:1. Red-green colorblindness is caused by a recessive allele (X) at an X-linked gene, and albinism is caused by a recessive allele (a) at an autosomal gene. A phenotypically normal woman (Sara) has a father who is colorblind, and she knows that she is a carrier for albinism. She plans to have a child with a colorblind man (Abdul) who is also a carrier for albinism. What is the probability that Sara and Abdul's child will have one of the conditions, but not both? Follow the steps below to answer this question. a) What is the cross? b) What are the target genotypes? Note: it might be useful to come back to this one and double- check it after you have completed step c, below. c) Break this down to the single gene level by answering the following questions: a. What is the proportion of normal to albino offspring? Show the Punnett square: b. What is the proportion of normal to colorblind offspring? Show the Punnett square: d) What is the probability that Sara and Abdul's child will have one of the conditions, but not both? Show your work, including the probability of getting each target genotype and the total probability.
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