Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 13, Problem 11SQ
One gene that affects three traits is an example of ______.
- a. dominance
- b. codominance
- c. pleiotropy
- d. epistasis
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Two parents without cystic fibrosis have a child with cystic fibrosis. The allele for cystic fibrosis is therefore _________ to the non-disease allele
Group of answer choices
A. codominant
B. recessive
C. dominant
D. epistatic
E. incompletely dominant
A test cross is performed to determine if a specific individual is a carrier. The results generate a 50/50 ratio of phenotypes. The test subject is therefore ________.
A. Unable to reproduce
B. Homozygous recessive
C. Not following the rules of Mendelian genetics
D. Homozygous dominant
E. Heterozygous
In incomplete dominance, one alle is not fully dominant over another, so the heterozygous phenotype is _______.
A. an intermediate blend between the two homozygous phenotypes
B. the same as homozygous recessive phenotype
C. the same as the homozygous dominant phenotype
Chapter 13 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 13 - Prob. 1DAACh. 13 - Prob. 2DAACh. 13 - Prob. 3DAACh. 13 - Prob. 1SQCh. 13 - An organisms observable traits constitute its...Ch. 13 - Prob. 3SQCh. 13 - Prob. 4SQCh. 13 - The offspring of the cross AA aa are ________. a....Ch. 13 - Refer to question 5. Assuming complete dominance,...Ch. 13 - A testcross is a way to determine ________. a....
Ch. 13 - Assuming complete dominance, a cross between...Ch. 13 - The probability of a crossover occurring between...Ch. 13 - True or false? All traits are inherited in a...Ch. 13 - One gene that affects three traits is an example...Ch. 13 - The phenotype of individuals heterozygous for...Ch. 13 - _______ in a trait is indicated by a bell curve....Ch. 13 - Match the terms with the best description. ______...Ch. 13 - Mendel crossed a true-breeding pea plant with...Ch. 13 - Assuming that independent assortment occurs during...Ch. 13 - Refer to problem 2. Determine the predicted...Ch. 13 - For each genotype listed, what allele combinations...Ch. 13 - Prob. 5GPCh. 13 - Suppose you identify a new gene in mice. One of...Ch. 13 - Mutations in the TYR gene may render its enzyme...Ch. 13 - In sweet pea plants, an allele for purple flowers....Ch. 13 - Red-flowering snapdragons are homozygous for...
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- The phenotype of individuals heterozygous for_____ alleles comprises both homozygous phenotypes. a. epistatic c. pleiotropic b. codominant d. hybridarrow_forwardThe flower color gene studied by Mendel affected three traits. This is an example of ________. a. pleiotropic genes b. codominant inheritance c. polygenic inheritancearrow_forwardPercentage of crossing over is more when ______ A. Genes are located in a different cell B. Genes are not linked C. linked genes are located close to each other D. linked genes are located far apart from each otherarrow_forward
- A testcross is a way to determine_______ . a. phenotype b. genotype c. dominancearrow_forward_______in a trait is indicated by a bell curve. a. An epigenetic effect c. Incomplete dominance b. Pleiotropy d. Continuous variationarrow_forwardDetached earlobes (D) are dominant to attached earlobes (d). A heterozygous person is crossed with a homozygous recessive person. Which of the following correctly describes this cross? A. DD x DD B. DD x Dd C. Dd x Dd D. Dd x ddarrow_forward
- Alleles for Tay-Sachs disease are inherited in an autosomal recessive pattern. Why would two parents with a normal phenotype have a child with Tay-Sachs? a. Both parents are homozygous for a Tay-Sachs allele. b. Both parents are heterozygous for a Tay-Sachs allele. c. New mutations gave rise to Tay-Sachs in the child. d. b or carrow_forwardIn genetics, F stands for filial, which means ________. a. friendly c. final b. offspring d. hairlikearrow_forwardKlinefelter syndrome (XXY) can most be easily diagnosed by_______ . a. pedigree analysis c. karyotyping b. aneuploidy d. phenotypic treatmentarrow_forward
- what is the strongest evidence that this is not an x-linked recessive trait? Do not make any assumptions about whether the allele is rare or not. a. II-1 is affected b. III-2 is unaffected c. IV-2 is unaffected d. IV-1 is affected e. II-2 is unaffectedarrow_forwardWhen crossing two fruit flies with red eyes, which is a dominant trait, half of the male offspring are born with white eyes, but none of the females are. What is this an example of? A. an autosomal recessive trait B. an autosomal dominant trait C. an X-linked recessive trait D. an X-linked dominant traitarrow_forwardThe second-generation offspring of a cross between individuals who are homozygous for different alleles of a gene are called the_____ . a. F1 generation c. F2 generation b. hybrid generation d. daughtersarrow_forward
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