EBK HUMAN BIOLOGY
11th Edition
ISBN: 8220100545931
Author: MCMILLAN
Publisher: Cengage Learning US
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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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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?
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Chapter 20 Solutions
EBK HUMAN BIOLOGY
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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- 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.arrow_forwardHow is the inheritance of X-linked traits different from the inheritance of autosomal traits? How is the inheritance of X-linked and Autosomal traits similar? Please make a list of all similarities and differences. Please list a many differences and similarities as possible.arrow_forwardExplain how X-linked inheritance differs from inheritance ofautosomal traits.arrow_forward
- What are X-linked traits?arrow_forwardWith respect to the inheritance of X-linked recessive traits, which of the following is true? OA mother cannot transmit the recessive allele to her daughter. OA mother cannot transmit the recessive allele to her son. CA father with the trait can pass the trait to his sons. OA father with the recessive allele passes it to all of his daughters. A man with the recessive allele may not express the trait.arrow_forwardPredict the probability (using a Punnett square) of producing an offspring affected by a single gene X-linked mutation given the genotype of the parents. Compare these crosses in two cases: where the mutant allele is “A” vs where the mutant allele is “a” (XAXA x XaY) (XAXa x XAY) (XAXa x XaY) (XaXa x XAY) (XaXa x XaY). Include gender in the phenotype.arrow_forward
- On average, what will be the proportion of X-linked genes in the second individual that are the same as the first individual? A female and her mother. 1. 100% A male and his mother. 2. 50% A female and her father. 3. 0% A male and his father. > >arrow_forwardDescribe how X-linked traits are inherited and explain how X-linked inheritance is different from simple dominance inheritancearrow_forwardExplain why X-linked recessive traits in humans are observed in more males than females.arrow_forward
- Could a woman who expresses the x-linked color-blind trait have a son with normal vision?arrow_forwardDescribe the genetics of Huntington's Disease (choose all that are correct): X-linked Disease-causing alleles are full or partial loss-of-function alleles Autosomal Dominant Rare Late age of onset Recessivearrow_forwardExplain why the inheritance pattern of X-linked traitsdiffers in males and females.arrow_forward
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