Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Textbook Question
Chapter 14, Problem 15TYPSS
Suppose you are heterozygous for two genes that are located on different chromosomes. You carry alleles A and a for one gene and alleles B and b for the other. Draw a diagram illustrating what happens to these genes and alleles when meiosis occurs in your reproductive tissues. Label the stages of meiosis, the homologous chromosomes, sister chromatids, nonhomologous chromosomes, genes, and alleles. Be sure to list all the genetically different gametes that could form and indicate how frequently each type should be observed. On the diagram, identity the events responsible for the principle of segregation and the principle of independent assortment.
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In human spermatogenesis, mitosis of a stem cell gives rise to one cell that remains a stem cell and one cell that becomes a spermatogonium. Draw four rounds of mitosis for a stem cell and label; the daughter cells. For one spermatogonium, draw the cells it would produce from one round of mitosis followed by meiosis. Label the cells, and label mitosis and meiosis. What would happen if stem cells divided like spermatogonia?
Construct a table for the different stages of meiosis, giving the number of chromosomes per cell and the number of DNA molecules per cell for a cell that begins with 4 chromosomes (two homologous pairs) in G1. Include the following stages in your table: G1, S, G2, prophase I, metaphase I, anaphase I, telophase I (after cytokinesis), prophase II, metaphase II, anaphase II, and telophase II (after cytokinesis).
In a cell that has just begun the process of meiosis, as shown, what is the probability that a resulting gamete will have only maternally inherited chromosomes? (blue chromosomes are paternally inherited, red are maternally inherited)
a) 1/4
b) 1/2
c) 1/8
d) 1/16
e) 1/32
Chapter 14 Solutions
Biological Science (6th Edition)
Ch. 14 - 1. The genes for the trails that Mendel worked...Ch. 14 - 2. CAUTION Why is the pea wrinkled-seed allele a...Ch. 14 - Prob. 3TYKCh. 14 - 4. Mendel’s rules do not correctly predict...Ch. 14 - Prob. 5TYKCh. 14 - Prob. 6TYKCh. 14 - Example Problem Two black female mice are crossed...Ch. 14 - Prob. 8TYKCh. 14 - Prob. 9TYPSSCh. 14 - Prob. 10TYPSS
Ch. 14 - 11. In garden peas, yellow seeds (Y) are dominant...Ch. 14 - Prob. 12TYPSSCh. 14 - The smooth feathers on the back of the neck in...Ch. 14 - SOCIETY As a genetic counselor, you advise couples...Ch. 14 - 15. Suppose you are heterozygous for two genes...Ch. 14 - Suppose a woman with blood type O married a man...Ch. 14 - Prob. 17TYPSSCh. 14 - Society Two mothers give birth to sons at the same...Ch. 14 - Prob. 19TYPSSCh. 14 - QUANTITATIVE Recall that hemophilia is an X-linked...Ch. 14 - Prob. 21PIATCh. 14 - Given the pedigree, what is the most likely mode...Ch. 14 - Prob. 23PIATCh. 14 - QUANTITATIVE If the son with ALD in the third...Ch. 14 - Prob. 25PIATCh. 14 - Prob. 26PIAT
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- In human spermatogenesis, mitosis of a stem cell gives rise to one cell that remains a stem cell and one cell that becomes a spermatogonium. (a) Draw four rounds of mitosis for a stem cell, and label the daughter cells. (b) For one spermatogonium, draw the cells it would produce from one round of mitosis followed by meiosis. Label the cells, and label mitosis and meiosis. (c) Explain what would happen if stem cells divided like spermatogonia.arrow_forwardAfter telophase I of meiosis, the chromosomal makeup of each daughter cell is _____. diploid, and the chromosomes are each composed of a single chromatid haploid, and the chromosomes are each composed of a single chromatid diploid, and the chromosomes are each composed of two chromatids haploid, and the chromosomes are each composed of two chromatidsarrow_forwardHow would the mutation of a single chromosome in metaphase 1 of meiosis affect the process of meiosis? Use a simple cell with two chromosomes, what is the ratio of gametes with the mutation vs without the mutation?arrow_forward
- Describe the events taking place during meiosis? What are the different phases? What is the chromosomal content of the final product? Why must this occur to make a chromosomally viable human?arrow_forwardHuman cells normally have 46 chromosomes. For each of the following stages, state the number of chromosomes present in the particular cell.a) metaphase of mitosisb) metaphase I of meiosis c) telophase of mitosisd) telophase I of meiosis e) telophase II of meiosis (Remember that a pair of attached chromatids count as one chromosome.)arrow_forwardIdentify two ways meiosis contributes to genetic recombination? Why is it necessary to reduce the number of chromosomes in gametes? Blue whales have 44 chromosomes in every cell. Determine how many chromosomes you would expect to find in the following: Cachalot whale Egg cell Daughter cell from mitosis Daughter cell from mitosis IIarrow_forward
- In regards to MEIOSIS, give the order of the following events in terms of chromosome number. Question 48 options: meiosis 1 and cytokinesis one cell containing 92 chromosomes meiosis 2 and cytokinesis a total of four cells, each containing 23 chromosomes one cell containing 46 chromosomes two cells containing 46 chromosomesarrow_forwardHow would each of the following events affect the outcome of mitosis or meiosis? a. Mitotic cohesin fails to form early in mitosis. b. Shugoshin is absent during meiosis. c. Shugoshin does not break down after anaphase I of meiosis. d. Separase is defective.arrow_forwardThough the stages of meiosis have the same names as the stages of mitosis, they exhibit fundamental differences. What are the main differences between the two processes? Meiosis differs from mitosis in that the number of chromosomes is halved and genetic variation is introduced in meiosis, but not in mitosis Meiosis differs from mitosis in that the number of chromosomes is halved and genetic variation is reduced in meiosis, but not in mitosis. Metaphase and telophase portions of meiosis and mitosis are the same. Meiosis and mitosis are also the same, except for the number of chromosomes. Anaphase I and anaphase are different. Prophase and telophase portions of meiosis and mitosis are the same. Meiosis II and mitosis are also the same and have the same number of chromosomes. Anaphase I and anaphase are different.arrow_forward
- Draw a diagram that illustrates how these chromosomes pair up during Metaphase I of Meiosis. Be sure to include all chromosomes, chromatids, genes, and centromeres in your diagram.arrow_forwardin the expermient of following chromosomal dna movement through meiosis, how many chromosomes were present when meiosis I started? How many nuclei are present at the end of meiosis ll? How many chromosomes are in each? What is the ploidy of the DNA at the end of meiosis l? What about at the end of meiosis ll? How are meiosis l and meiosis ll different? List two reasonarrow_forwardIn a comparison of the stages of meiosis to the stages of mitosis, which stages are unique ... to meiosis and which stages have the same events in both meiosis and mitosis?arrow_forward
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