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 7SQ
A gamete affected by nondisjunction could have __________.
- a. a change from the normal chromosome number
- b. one extra or one missing chromosome
- c. the potential for a genetic disorder
- d. all of the above
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What is it called when chromosomes fail to separate properly during meiosis?
A. Nondisjunction
B. Karyotype
C. Chromosomal separation failure
D. Inappropriate separation
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which of these could lead to the mistake evident in the karyotype?
A) a failure of cytokinesis after meiosis I in gamete formation
B) a nondisjunction in meiosis II in gamete formation
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D) fertilizaton by two sperm in zygote formation
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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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- In diseases with a recessive inheritance linked to sex (X chromosome), from the mother: A. 50% of women and 50% of men are affected. B. The woman is always affected by the disease. C. The man is always affected by the disease. D. 50% of women are affected.arrow_forwardThe term endopolyploidy refers to the phenomenon of havinga. too many chromosomes.b. extra chromosomes inside the cell nucleus.c. certain cells of the body with extra sets of chromosomes.d. extra sets of chromosomes in gametes.arrow_forwarda)recessive epistasis b)duplicate recessive epistasis c)normal non-allelic gene interaction d)normal allelic gene interactionarrow_forward
- Consider a diploid cell from an unknown organism that undergoes meiosis. The four gametes produced have 8, 8, 7, and 5 chromosomes. When did nondisjunction occur? a.Meiosis I and II b.Only meiosis I c.Mitosis d.Only meiosis II e.Nondisjunction did not occurarrow_forwardWhen two genes are genetically “linked”, gametes produced during meiosis will usually contain allele combinations that mimic the way the alleles were placed on the parent cell’s chromosomes unless what process successfully occurs? Select one: a. Disjunction b. Self-fertilization c. Crossing over/recombination d. Aneuploidyarrow_forwardConsider a diploid cell from an unknown organism that undergoes meiosis. The four gametes produced have 8, 8, 7, and 5 chromosomes. When did nondisjunction occur? a. Only meiosis I b. Mitosis c. Meiosis I and II d. Nondisjunction did not occur e. Only meiosis II Clear my choicearrow_forward
- Which of the following best describes Klinefelter syndrome? A. It is an example of aneuploidy. B. Affected individuals are males with low fertility. C. Only one X chromosome is active in these individuals. D. All of the above.arrow_forwardAt the end of meiosis in humans, four gametes are produced that are: A. Genetically identical to each other and to the parent cell B. Genetically identical to each other but genetically different from the parent cell C. Genetically different from each other and the parent cell D. Genetically identical to the parent cell from different from each otherarrow_forwardWhat process might produce a gamete with one extra chromosome? a. Nondisjunction c. Translocation b. Crossing over d. Independent assortmentarrow_forward
- Match the terms with the best description. ___ dihybrid cross a. bb ___ monohybrid cross b. AaBbAaBb ___ homozygous condition c. Aa ___ heterozygous condition d. AaAaarrow_forwardA turkey farmer is worried about a new disease that is found in his birds. If affects females more than males. Which of the following is(are) reason(s) that explain this finding? The disease is sex linked b The disease is autosomal recessive c The disease is located on the Z chromosome d A and C e B and Carrow_forwardimagine a giraffe whose diploid is 30. A)Under what circumstances would the giraffe go through a process of meiosis? . b) what will be the final result of this meiosis for the giraffe (# of cells + # of chromosomes/cells)arrow_forward
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