Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 20, Problem 9SQ
A person who is a carrier for a genetic trait ___________.
- a. is heterozygous for a dominant trait
- b. is heterozygous for a recessive trait
- c. is homozygous for a recessive trait
- d. could be either a or b but not c
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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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- A man who is a carrier for cystic fibrosis marries a woman who is a carrier for cystic fibrosis. Respond to the question based upon this scenario. The couple in the above scenario has four children. How many of their children will have cystic fibrosis? a. one b. two c. it could be none to all of their children d. it depends whether they are male or femalearrow_forwardColor blindness is inherited in a(n)_____ pattern. a. autosomal dominant c. X-linked dominant b. autosomal recessive d. X-linked recessivearrow_forwardTraits that are hidden and do not manifest in the offspring are called_________. A. Dominant trait B. Recessive trait C. Intelligence traits D. Character traitsarrow_forward
- Consanguinity is having offspring together who are blood-related. Their children have a higher risk of having a second child with an autosomal recessive condition A. Both statements are correct B. Both statements are incorrect C. Statement 1 is correct. Statement 2 is incorrect D. Statement 2 is correct. Statement 1 is incorrectarrow_forwardPolydactyly is a congenital physical anomaly in in humans, dogs, cats; and having supernumerary fingers or toes. If it is an autosomal dominant trait, when is a genotype of a person that shows normal phenotype? a. heterozygous recessive b. heterozygous dominant c. homozygous recessive d. homozygous dominantarrow_forwardJoe has classic hemophilia, an X-linked recessive disease. Could Joe have inherited the gene for this disease from the following people? Yes No a. His mother's mother b. His mother's father c. His father's mother d. His father's fatherarrow_forward
- A man who is a carrier for cystic fibrosis marries a woman who is a carrier for cystic fibrosis. Respond to the question based upon this scenario. What is the percentage probability that this couple will have a child with cystic fibrosis? a. 50% b. 100% c. 75% d. 25%arrow_forwardBaldness is a phenomenon where individuals lose hair as they grow older. As an X-linked recessive gene, what instances do females manifest this trait? a. heterozygous recessive b. heterozygous dominant c. homozygous recessive d. homozygous dominantarrow_forwardBrandy has naturally blond hair. Based on this information, what do we know about Brandy’s parents? a. At least one of her parents has a recessive blond hair gene. b. Each of her parents must have one recessive blond hair gene. c. Each of her parents must have one dominant brown hair gene. d. Neither of her parents has a recessive blond hair gene.arrow_forward
- A recessive trait will be observed in individuals that are ________ for that trait. a. heterozygous b. homozygous or heterozygous c. homozygous d. diploidarrow_forwardA man who is a carrier for cystic fibrosis marries a woman who is a carrier for cystic fibrosis. Respond to the question based upon this scenario. What is the percentage probability that they will have a child who is a carrier? a. 50% b. 100% c. 75% d. 25%arrow_forwardColorblindness is a recessive x-linked trait. Which genotype represents a male with normal vision? a. XNXN b. XYN c. XnY d. XNYarrow_forward
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Beyond Mendelian Genetics: Complex Patterns of Inheritance; Author: Professor Dave Explains;https://www.youtube.com/watch?v=-EmvmBuK-B8;License: Standard YouTube License, CC-BY