Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 18, Problem 3CT
Adam’s maternal and paternal chromosomes have alternate forms of a gene that influences whether a person is right-handed or left-handed. One form says “right” and its partner says “left.” Visualize one of Adam’s spermatogonia, in which chromosomes are being duplicated prior to meiosis. Visualize what happens to the chromosomes during anaphase I and II. (It might help to use toothpicks as models of the sister chromatids of each chromosome.) What fraction of Adam's sperm will carry the gene for right-handedness? For left-handedness?
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Which statement correctly describes human chromosomes after meiosis I?
Human gametes end up with one of each type of 23 chromosomes.
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Chapter 18 Solutions
Human Biology (MindTap Course List)
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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- During which phases of the mitotic cycle would the terms chromosome and chromatid refer to identical structures?arrow_forwardMeiosis ensures the even distribution of chromosomes to the daughter cells. Why does meiosis can result in uneven distribution of chromosomes to the daughter cells?arrow_forwardWhen does DNA replication occur during meiosis? a. during telophase b. during prophase I c. during anaphase and telophase d. during interphase before meiosis I beginsarrow_forward
- The horse has a diploid set of 64 chromosomes, and a donkey has a diploid set of 62 chromosomes. Mules (viable but usually sterile) are produced when a male donkey is mated to a female horse. How many different chromosomes will a mule somatic (body) cell contain? Explain your answer.arrow_forwardThese all center on sex determination or the expression of genes encoded on sex chromosomes. Write a short essay that discusses sex chromosomes as they contrast with autosomesarrow_forwardA Common Wombat has 14 chromosomes in one of its somatic cells. One of these cells goes into meiosis. How many cells result, and how many chromosomes does each one of these cells have?arrow_forward
- From this point on, meiosis is very similar (but not exactly similar) to what happened in mitosis. How many copies of each type of chromosome end up in the daughter cells of meiosis when it is complete?arrow_forwardWhich process occurs in meiosis but does not occur in mitosis? 1.synapsid of chromosomes2.chromosome replication 3.alignment of chromosomes at the metaphase plate 4.condensation of chromosomesarrow_forwardin meiosis, does the DNA duplicatearrow_forward
- Meiosis results in which what of the following? a.)2 haploid daughter cells b.)2 diploid daughter cells c.)4 haploid daughter cells d.)4 diploid daughter cellsarrow_forwardGive explanation X and Y chromosomes are not homologs, but in meiosis they do pair and segregate in XY organisms to create 50% haploid gametes with an X chromosome and 50% haploid gametes with a Y chromosome. How is pairing achieved? a. Since all other homologous chromosomes pair, the remaining two chromosomes pair by default. b Pairing proteins are capable of binding to different genes on the X and Y chromosomes, which allows them to pair. c. None of the statements is correct. d. They don't actually pair. Random segregation generally ensures the X and Y chromosomes separate. e.Pseudoautosomal regions that are homologous exist at the tips of both the X and Y chromosomes, and they allow pairing.arrow_forwardWhat chromosomes belong to a normal human female? 44 autosomes and 2 X chromosomes 22 autosomes and 2 X chromosomes 44 autosomes, one X chromosome, and one Y chromosome 46 autosomes and two X chromosomesarrow_forward
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