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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 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_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_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_forward
- Baldness 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_forwardA recessive trait will be observed in individuals that are ________ for that trait. a. heterozygous b. homozygous or heterozygous c. homozygous d. diploidarrow_forward
- If a person has one gene influencing blue eyes but actually has brown eyes, blue eyes must be a __________ trait. a. dominant b. recessive c. sex-linked d. polygenicarrow_forwardColorblindness is a recessive x-linked trait. Which genotype represents a male with normal vision? a. XNXN b. XYN c. XnY d. XNYarrow_forwardDarrell and Matilda each have type O blood. If they start a family, the probability that they will have a child having type A blood is ________. a. 100% b. 75% c. 50% d. 25% e. 0%arrow_forward
- An individual’s ________ is its genotype. a. genetic composition b. number of chromosomes c. physical appearancearrow_forwardChoose the MOST LIKELY inheritance pattern for the trait shown in the pedigree. a. Sex-linked dominant b. Autosomal recessive c. Sex-linked recessive d. Autosomal Dominantarrow_forwardA trait that is present in a male child but not in either of his parents is characteristic of inheritance. a. autosomal dominant b. autosomal recessive c. X-linked recessive d. It is impossible to answer this question without more informationarrow_forward
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