(Lecture 13 Study Guide, Question #10) Genetic traits on the X-chromosome are called X-linked. Some X-linked conditions are referred to as X-linked dominant, such as Fragile X Syndrome. Consider the following genetic cross: A father with Fragile X Syndrome and a mother with normal phenotype. Perform a Punnett Square. Select the possible genotypes of their offspring below. xfY xFxf xFY

(Lecture 13 Study Guide, Question #10) Genetic traits on the X-chromosome are called X-linked. Some X-linked conditions are referred to as X-linked dominant, such as Fragile X Syndrome. Consider the following genetic cross: A father with Fragile X Syndrome and a mother with normal phenotype. Perform a Punnett Square. Select the possible genotypes of their offspring below. xfY xFxf xFY

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter7: Development And Sex Determination

Section: Chapter Questions

Problem 17QP: Equalizing the Expression of X Chromosome Genes in Males and Females How many Barr bodies would the...

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My Question is what is the probability their first child will have hemophilia and drawn pedigrees for family members with genotypes. My explantion so far: A man has both X and Y chromosomes as sex chromosomes in his body. Here, though the brother of the man is hemophiliac, a man can’t be a carrier of hemophilia. So, it can be said that his chromosome is “XnY”.Here, the “n” stands for “normal”.Though the paternal uncle is hemophiliac, a man cannot be a carrier of hemophilia, his niece will not be a career. So it can be said that the woman is also not a carrier and has the “XnX” chromosome.So, as the mother is not a carrier, their first child does not have a chance of having hemophilia. This can be determined as it is known that there is no hidden carrier of hemophilia in the family.
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