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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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X-Linked Recessive Disorder: Color Blindness
3. Color blindness is an X-linked recessive disorder in humans. XC is a normal allele. Xº is a
color blind allele. A woman who is a carrier of color blindness (XX) has children with a
man who is not color blind (XY). What are the chances that a male child will be colorblind?
What are the chances that a child will be a carrier?
a. Phenotypes of the parents:
b. Genotypes of the parents:
c. Gamete genotypes:
d. Punnett Square:
(egg)
Mother:
Mother:
Egg :
(sperm)
g. What are the chances a boy will be colorblind?
Report data as a percentage:
Father:
Father:
e. List all possible genotypes of offspring of these parents:
1. Which of these genotypes are heterozygous?
2. Which of these genotypes are homozygous?
f. List all the possible phenotypes of offspring of these parents:
62
Sperm :
as a fraction:
h. What are the chances that a girl will be a carrier of colorblindness?
Report data as a percentage:
as a fraction:
Transcribed Image Text:X-Linked Recessive Disorder: Color Blindness 3. Color blindness is an X-linked recessive disorder in humans. XC is a normal allele. Xº is a color blind allele. A woman who is a carrier of color blindness (XX) has children with a man who is not color blind (XY). What are the chances that a male child will be colorblind? What are the chances that a child will be a carrier? a. Phenotypes of the parents: b. Genotypes of the parents: c. Gamete genotypes: d. Punnett Square: (egg) Mother: Mother: Egg : (sperm) g. What are the chances a boy will be colorblind? Report data as a percentage: Father: Father: e. List all possible genotypes of offspring of these parents: 1. Which of these genotypes are heterozygous? 2. Which of these genotypes are homozygous? f. List all the possible phenotypes of offspring of these parents: 62 Sperm : as a fraction: h. What are the chances that a girl will be a carrier of colorblindness? Report data as a percentage: as a fraction:
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