EBK HUMAN BIOLOGY
11th Edition
ISBN: 8220100545931
Author: MCMILLAN
Publisher: Cengage Learning US
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Textbook Question
Chapter 20, Problem 3SQ
Genes on the same chromosome tend to stay together during _____ and end up in the same ______.
- a. mitosis; body cell
- b. mitosis; gamete
- c. meiosis; body cell
- d. meiosis; gamete
- e. both a and d
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The 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 only
Match the specific phase of meiosis with the correct description._____ Prophase I a. Homologous chromosomes arrive atopposite poles._____ Metaphase I b. Homologous chromosomes line up._____ Anaphase I c. Chromosomes line up at the equator._____ Telophase I d. Independent assortment occurs._____ Prophase II e. Separated sister chromatids arrive atopposite poles._____ Metaphase II f. Sister chromatids remain condensed._____ Anaphase II g. Crossing over occurs._____ Telophase II h. Sister chromatids pull apart.
Human gametes ___
a.
are produced by mitosis
b.
have one copy of each chromosome
c.
have two copies of each chromosome
d.
are genetically identical to every other gamete made by that person
e.
all of the above are true
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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- Genetic variation from meiosis is generated during ________. a. both meiosis I and meiosis II b. meiosis II c. meiosis Iarrow_forwardThe 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, mitosisarrow_forwardNondisjunction in meiosis can result in_____ . a. base-pair substitutions c. crossing over b. aneuploidy d. pleiotropyarrow_forward
- Cells at the end of meiosis (i.e. each of the four gametes) have _____ when compared with cells at thebeginning of meiosis (i.e. the parent cell in prophase I).a. half the number of chromosomes and one-fourth the amount of DNAb. half the number of chromosomes and half the amount of DNAc. the same number of chromosomes and half the amount of DNAd. half the amount of cytoplasm and half the amount of DNAarrow_forward. Complete the following statements using as many ofthe following terms as are appropriate: mitosis, meiosis I (first meiotic division), meiosis II (second meioticdivision), and none (not mitosis nor meiosis I normeiosis II).a. The spindle apparatus is present in cells undergoing_____.b. Chromosome replication occurs just prior to _____.c. The cells resulting from _____ in a haploid cellhave a ploidy of n.d. The cells resulting from _____ in a diploid cellhave a ploidy of n.e. Homologous chromosome pairing regularly occursduring _____.f. Nonhomologous chromosome pairing regularlyoccurs during _____.g. Physical recombination leading to the productionof recombinant progeny classes occurs during_____.h. The separation of sister centromeres occurs during_____.i. Nonsister chromatids are found in the same cellduring _____.arrow_forwardCRITERIA MITOSIS MEIOSIS a. chrosomosomes number of daughter cells b. number of cell divisions c. stages d. Presence of synapses e. presence of crossing over f. cell type that undergoes cell division g. number of daughter cells formed h. DNA content of cells at start of division i. DNA content of daughter cells j. genetic consequencesarrow_forward
- Which of the following statements accurately describes a differencebetween mitosis and meiosis?a. Mitosis may produce diploid cells, whereas meiosis produceshaploid cells.b. Homologous chromosomes synapse during meiosis but do notsynapse during mitosis.c. Crossing over commonly occurs during meiosis, but it does notcommonly occur during mitosis.d. All of the above are correct.e. Both a and c are correctarrow_forwardThe part of meiosis that is similar to mitosis is________.a. meiosis Ib. anaphase Ic. meiosis IId. interkinesisarrow_forwardMeiosis usually produces ________ daughter cells. a. two haploid b. two diploid c. four haploid d. four diploidarrow_forward
- Homologous chromosomes come together and line up along their entire lengths A. in meiosis in prokaryotes and mitosis in prokaryotes. B. in both mitosis and meiosis. C. in mitosis in prokaryotes and meiosis in eukaryotes. D. only in meiosis. E. only in mitosis. 2 parrow_forwardMost body (nonreproductive) cells of humans and other multicellular eukaryotes have two sets of each chromosome. Such cells are _________ and the matching pairs of chromosomes are called _________. a. diploid; homologous chromosomes b. haploid; homologous chromosomes c. diploid;sisterchromatidsd. tetraploid; sister chromatidsarrow_forwardWhich of the following is the primary difference between mitosis and meiosis? A. Meiosis occurs in somatic cells, whereas mitosis is only used to produce germ cells. B. Mitosis occurs in somatic cells, whereas meiosis is only used to produce germ cells. C. Meiosis always occurs much more quickly than mitosis. D. Only meiosis includes a separation division step, which occurs during Meiosis I.arrow_forward
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