Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 20, Problem 4RQ
Summary Introduction
To differentiate: X-linked trait and a sex-influenced trait.
Introduction: X-linked traits denote that a gene for a particular trait is located on the X-chromosome. Sex influences traits denote that a gene for a particular trait is located on autosome but is influenced by the sex of that individual.
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What characteristics are exhibited by an X-linked trait?
Explain the difference between X-linked recessive traits and X-linked dominant traits. What are the possibilities that a female child will be affected and express each of the traits?
Describe how X-linked traits are inherited and explain how X-linked inheritance is different from simple dominance inheritance
Chapter 20 Solutions
Human Biology (MindTap Course List)
Ch. 20 - Prob. 1RQCh. 20 - What is a carrier of a genetic trait?Ch. 20 - What evidence indicates that a trait is coded by a...Ch. 20 - Prob. 4RQCh. 20 - Explain what nondisjunction is, and give two...Ch. 20 - _______ segregate during ______. a. Homologues;...Ch. 20 - Prob. 2SQCh. 20 - Genes on the same chromosome tend to stay together...Ch. 20 - Prob. 4SQCh. 20 - A chromosomes structure can be altered by _______....
Ch. 20 - Nondisjunction can be caused by ________. a....Ch. 20 - A gamete affected by nondisjunction could have...Ch. 20 - Genetic disorders can be caused by __________. a....Ch. 20 - A person who is a carrier for a genetic trait...Ch. 20 - Prob. 10SQCh. 20 - If a couple has six boys, what is the probability...Ch. 20 - Human sex chromosomes are XX for females and XY...Ch. 20 - People with Down syndrome have an extra copy of...Ch. 20 - Prob. 4CTCh. 20 - Prob. 5CTCh. 20 - About 4 percent of people of Northern European...Ch. 20 - The following pedigree shows the pattern of...
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- cross a wild female with a male that has white eyes and a tan body. recall from the exercise that both of these traits are x-linked traits.arrow_forwardExplain why X-linked recessive traits are often more common in males but X-linked dominant traits are often more common in females.arrow_forwardWould you expect dominant X-linked traits to affect women as often as men? Explain your answer.arrow_forward
- If a gene is X-linked, explain why the recessive phenotype would be more often seen in males then in females. Also explain what the term “carrier” means related to these traits.arrow_forwardCould a woman who expresses the x-linked color-blind trait have a son with normal vision?arrow_forwardWhy are males affected by X-linked disorders much more oftenthan females?arrow_forward
- Explain why X-linked recessive traits in humans are observed in more males than females.arrow_forwardAn individual that is genetically male develops as a female. Is this individual more or less likely to express an X-linked recessive disorder than an average female?arrow_forwardWhat are X-linked traits?arrow_forward
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