Bundle: Human Biology, Loose-leaf Version, 11th + MindTap Biology, 1 term (6 months) Printed Access Card
11th Edition
ISBN: 9781305616660
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 18, Problem 10SQ
Because of the ________ alignment of homologous chromosomes during meiosis, gametes can end up with _________ mixes of maternal and paternal chromosomes.
- a. unvarying; different
- b. unvarying; duplicate
- c. random; duplicate
- d. random; different
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Which of the following meiotic events by itself does NOT result in an abnormal set of genes in a gamete?
a.
Translocation
b.
Deletion
c.
Nondisjunction
d.
Recombination
e.
Inversion
An individual can have an abnormal number of chromosomes as a result of nondisjunction. Identify the following example of nondisjunction that results in an abnormal number of chromosomes.
A. Sister chromatids do not separate in meiosis II.
B. Homologous chromosomes move apart appropriately during meiosis I.
C. Mitosis occurs normally during embryonic development.
D. Two normal gametes fuse during fertilization.
a. If a set of chromosomes is one copy of each kind of chromosome, how many sets are in a human sperm_____. How many chromosomes are in a human sperm____.
b. How many sets of chromosomes are in a human egg_____. How many chromosomes are in a human egg_____.
c. Why is there such a different in size and number of sperm cells in the testes compared to the number of oocytes in the ovaries ?
Chapter 18 Solutions
Bundle: Human Biology, Loose-leaf Version, 11th + MindTap Biology, 1 term (6 months) Printed Access Card
Ch. 18 - Prob. 1RQCh. 18 - Prob. 2RQCh. 18 - Prob. 3RQCh. 18 - Name the four main stages of mitosis, and describe...Ch. 18 - Prob. 5RQCh. 18 - Prob. 6RQCh. 18 - Prob. 1SQCh. 18 - Prob. 2SQCh. 18 - Prob. 3SQCh. 18 - Prob. 4SQ
Ch. 18 - Prob. 5SQCh. 18 - After mitosis, each daughter cell contains genetic...Ch. 18 - All of the following are stages of mitosis except...Ch. 18 - Prob. 8SQCh. 18 - Prob. 9SQCh. 18 - Because of the ________ alignment of homologous...Ch. 18 - Match the stage of mitosis with the following key...Ch. 18 - Normally you cant inherit both copies of a...Ch. 18 - Suppose you have a way of measuring the amount of...Ch. 18 - Adams maternal and paternal chromosomes have...Ch. 18 - Fresh out of college, Maria has her first job...
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- The two main sources of genetic variation from meiosis are ________. a. random orientation of homologous pairs and mutation b. crossing over and random mutation c. random orientation of homologous pairs and crossing overarrow_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_forwardGenetic variation from meiosis is generated during ________. a. both meiosis I and meiosis II b. meiosis II c. meiosis Iarrow_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_forwardDown's syndrome, trisomy 21, is due to what likely problem during meiosis? Select one: a. Failure of the APC to add Ub to cohesins, so sister chromatids due not split correctly in anaphase II. b. DNA replication issues causing an additional third chromosome to be replicated. c. Overactive APC adding to many Ub to cohesins, so sister chromatids due not split correctly in anaphase II. d. Failure of the MPF to add Ub to cohesins, so sister chromatids due not split correctly in anaphase II.arrow_forwardWhich of the following mechanisms contributes to genetic variation through sexual reproduction via the random orientation of pairs of homologous chromosomes at metaphase of meiosis I? A. crossing over B. random fertilization C. independent assortment of chromosomes D. cytokinesisarrow_forward
- 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_forwardMatch the following with the term that best describes them ✓number of cells after meiosis ✓number of cells before meiosis ✓type of cells that undergo mitosis ✓number of chromosomes after meiosis ✓type of cells that undergo meiosis ✓ number of chromosomes before meiosis A. diploid B. haploid C. one D.four E. gonads F. somaticarrow_forwardIn meiosis, we talk about the daughter cells having half the chromosomes of the parent cell. Choose the option that best describes what is happening to end up with half the number of chromosomes in the daughter cells. Question 8Answer a. All of the chromosomes are chemically cut in half so the daughter cells get the top or the bottom half of each of the chromosomes. b. Each daughter cell has one chromosome from each of the homologous pairs found in the parent cell. c. Each daughter cells gets a random set of chromosomes that add up to half the number of chromosomes as the parent cells had..arrow_forward
- Meiosis usually produces ________ daughter cells. a. two haploid b. two diploid c. four haploid d. four diploidarrow_forwardGenes G and H are located on chromosome 18. A woman with the genotype Gg Hh has a child with a man with the genotype GG HH. Unfortunately, the child has the genotype Ggg hhh and only survives for 6 months. When and in which parent did nondisjunction occur? Group of answer choices a. Meiosis II in the mother b. Meiosis I in the mother c. Meiosis I in the father d. Meiosis II in the fatherarrow_forwardThe diploid chromosome number of a dog, Canis familiaris, is . Which of the following rows correctly identifies the number of cells and chromosomes in each cell after the process of spermatogenesis has completed? Select one: a. # of Cells # of Chromosomes 3 26 b. # of Cells # of Chromosomes 1 39 c. # of Cells # of Chromosomes 2 78 d. # of Cells # of Chromosomes 4 39arrow_forward
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