EBK HUMAN BIOLOGY
11th Edition
ISBN: 8220100545931
Author: MCMILLAN
Publisher: Cengage Learning US
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Textbook Question
Chapter 20, Problem 1SQ
_______ segregate during ______.
- a. Homologues; mitosis
- b. Genes on one chromosome; meiosis
- c. Homologues; meiosis
- d. Genes on one chromosome; mitosis
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Which phase of meiosis reduces the chromosomenumber?a. prophase I c. anaphase Ib. prophase II d. anaphase II
The picture depicts what stage of MEIOSIS?
a. metaphase 1
b. metaphase Il
c. prophase 1
d. prophase II
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The dividing cells shown in the picture would be in _?_ of _?_. Assume that the starting cell was diploid and it was 2n=4.
A. Metaphase, mitosis
B. Metaphase, meiosis I
C. Metaphase, meiosis II
D. Anaphase, meiosis I
E. Anaphase, mitosis
Chapter 20 Solutions
EBK HUMAN BIOLOGY
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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- Any deviation in the number of chromosomes that involves individual chromosomes, as opposed to entire sets of chromosomes, is known as which one of the following?a. Aneuploidy c. Duplication b. Disomy d. Translocationarrow_forwardWhich of the following statements is INCORRECT? Mitosis is a conservative mechanism that preserves the genetic status quo. Meiosis is a special type of cellular division that occurs in gametes. After mitosis, two identical 2n daughter cells are produced. After meiosis I, four n daughter cells are produced. Genetic recombination or diversity is a feature of __________. A. Meiosis I C. Mitosis B. Meiosis II D. Choices A, B, and C are correct. The following are cellular events during prophase I, EXCEPT: A. Chromatin condensation C. Crossing-over B. Synapsis D. Paired homologs attach to spindle fibers. Which of the following statements refers to synapsis? It is the pairing of homologous chromosomes during meiosis. It is the alignment of chromosomes on the equatorial plate. It is the exchange of parts between non-sister chromatids. It represents the sites where crossing-over occurred. Which of the following events below…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
- Which phase of meiosis is depicted in the drawing below?a. Metaphase of meiosis Ib. Metaphase of meiosis IIc. Anaphase of meiosis Id. Anaphase of meiosis IIarrow_forwardThese items separate from each other during anaphase 2 of meiosis. a. Sister chromatids b. Homologous chromosome c. Genes d. The two parts of a cellarrow_forwardWhich of the following can occur by the process of meiosis but not mitosis? A. Haploid cells fuse to form diploid cells B. Diploid cells form haploid cells C. A diploid cell combines with a haploid cell D. Haploid cells multiply into more haploid cellsarrow_forward
- Which of the following terms describes the process of homologous chromosomes failing to separate correctly during meiosis?A. Chromatid adhesion syndromeB. NondisjunctionC. AmetaphasiaD. Anti-anaphasearrow_forwardWhat is it called when chromosomes fail to separate properly during meiosis? A. Nondisjunction B. Karyotype C. Chromosomal separation failure D. Inappropriate separation E. Karyokinesisarrow_forwardCells that result from meiosis are: a. Diploid b. Haploid c. Zygotic d. Triploidarrow_forward
- Homologous chromosomes move toward opposite poles of a dividing cell during a. fertilization b. meiosis II c. meiosis I d. mitosisarrow_forwardNondisjunction in meiosis can result in_____ . a. base-pair substitutions c. crossing over b. aneuploidy d. pleiotropyarrow_forwardThe following image shows one specific stage of meiosis. Which of the following correctly states what is occurring in this stage? A. Microtubules have begun to pull sister chromatids apart, pulling them toward the poles of the cells. There are two cells at this stage. B. Microtubules have begun to pull homologous chromosomes apart, pulling them toward the poles of the cell. There is only one cell at this stage. C. Microtubules have attached to the chromosomes. Homologous chromosomes are aligned at the midpoint of the cell. There is only one cell at this stage. D. The chromosomes have reached the poles of the cell. There are technically two cells, but cytokinesis has begun in each.arrow_forward
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