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 6SQ
Nondisjunction can be caused by ________.
- a. crossing over in meiosis
- b. segregation in meiosis
- c. failure of chromosomes to separate during meiosis
- d. multiple independent assortments
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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
C) crossing over in meiosis ! in gamete formation
D) fertilizaton by two sperm in zygote formation
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 occur
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.
Only meiosis I
b.
Mitosis
c.
Meiosis I and II
d.
Nondisjunction did not occur
e.
Only meiosis II
Clear my choice
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
- imagine 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_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_forwardThe law of segregation of chromosomes arises due to events in _________. A. Mitosis and meiosis II B. Mitosis and meiosis I C. Meiosis I only D. Meiosis II onlyarrow_forward
- At 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_forwardMeiosis explains whya. you inherited half of your DNA from each of your parents.b. the sister chromatids in a chromosome are identical to each other.c. each of your somatic cells contains the same DNA.d. zygotes contain half as much DNA as somatic cells.arrow_forwardHomologous chromosomes move toward opposite poles of a dividing cell during a. fertilization b. meiosis II c. meiosis I d. mitosisarrow_forward
- The part of meiosis that is similar to mitosis is_______. a. meiosis I b. anaphase I c. meiosis II d. interkinesisarrow_forwardCrossing over.... a. leads to the exchange of material between homologous chromosomes in meiosis. b. requires the pairing of homologous chromosomes in prophase of meiosis I. c. happens less frequently between genes that are far apart on a chromosome than between genes that are close together. d. a and b, but not c e. a, b, and carrow_forwardThe process of meiosis ensures that organisms will have a. The same diploid number its parents have. b. Different numbers of chromosomes from what are parents have. c. The ability to reproduce by budding. d. A different haploid number from what its parents have. e. Splits into two daughter cells.arrow_forward
- Meiosis is a necessary part of sexual reproduction because it_____ . a. divides two nuclei into four new nuclei b. reduces the chromosome number for gametes c. gives rise to new allelesarrow_forwardBetween meiosis I and meiosis II, meiosis II is more similar to mitosis.arrow_forwardWhich of the processes does not lead to variation in offspring with the same parents?* A. Random fusion of gametes from different parents. B. Random assortment of chromosomes in M1 C.Crossing over of chromosomes D.Interkinesisarrow_forward
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