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Biology

Are males or females are more often affected by sex-linked traits? Explain why.

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 9QP

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Concept explainers

Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.

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How can sex limited traits affect an individual?
Can a woman who is affected by an X-linked dominant disorder have a child who is not affected? Why or why not?
Why do human sex-linked recessive traits typically show up in sons more than daughters? Hint: consider the probabilities involved in the inheritance of such traits.
If a father is affected by an X-linked dominant condition and the mother is normal, what is the probability of their children being affected? All sons will be affected. Half of the sons will be affected. All daughters will be affected. Half of the daughters will be carriers.
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