Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 10.2, Problem 1CSC
Summary Introduction
To determine: Whether the process of gamete formation and union can explain the full range of diverse traits exhibited by the children of the given parents.
Introduction: The male and female gametes are formed by meiosis, which is a reduction division resulting in haploid gametes from diploid germ cells. During sexual reproduction, the haploid male and female gametes combine to a diploid zygote.
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Table 8.1 shows that Turner syndrome occurs when an individual inherits one X chromosome but lacks a second sex chromosome. Can Turner syndrome be due to nondisjunction during oogenesis, spermatogenesis, or both? If a phenotypically normal couple has a color-blind child (due to a recessive X-linked allele) with Turner syndrome, did nondisjunction occur duringoogenesis or spermatogenesis in this child’s parents? Explain your answer.
Jeff's spermatogonium (precursor sperm cell before meiosis) looks like the cell on the left (only four chromosomes are shown. Assume all the other chromosomes behaved normally).
After meiosis, Jeff makes a sperm that looks like the cell on the right.
Assume the A/a and F/f genes are near the centromere where crossing over is suppressed. When did a nondisjunction event occur to create this sperm?
(i)Draw a diagram of Metaphase I and II of meiosis in the father, which illustrates the only possible way in which the father’s chromosomes could have aligned during Metaphase I, and in the subsequent Metaphase II in the same cell, in order to have resulted in the conception of the specific son who has all three of these genetic conditions (achondroplasia, color blindness and deafness).
(ii) Then, in the final set of diagrams, show the specific genes and chromosomes present in each of the four gametes that would have resulted from this series of events during meiosis I and II in the father.
(iii) Indicate which gamete or gametes produced by the father could have been involved in the son’s conception, by labeling the gamete(s) with an ARROW.
Chapter 10 Solutions
Biology
Ch. 10.1 - Prob. 1CSCCh. 10.1 - Prob. 1CYLCh. 10.1 - Prob. 2CYLCh. 10.1 - Prob. 3CYLCh. 10.2 - What would be the consequences for the resulting...Ch. 10.2 - What would be the genetic consequences for the...Ch. 10.2 - Prob. 1CSCCh. 10.2 - describe the steps and outcome of meiotic cell...Ch. 10.2 - Prob. 2CYLCh. 10.3 - explain how meiosis and sexual reproduction...
Ch. 10.4 - Prob. 1HYEWCh. 10.4 - Prob. 1CYLCh. 10.4 - describe some of the human genetic disorders that...Ch. 10.4 - Prob. 1TCCh. 10 - Prob. 1MCCh. 10 - Prob. 2MCCh. 10 - Prob. 3MCCh. 10 - Prob. 4MCCh. 10 - Prob. 5MCCh. 10 - Meiotic cell division produces ________ (how many)...Ch. 10 - During ___________ of meiosis 1, paired homologous...Ch. 10 - Prob. 3FIBCh. 10 - Prob. 4FIBCh. 10 - Prob. 5FIBCh. 10 - Prob. 1RQCh. 10 - Prob. 2RQCh. 10 - Prob. 3RQCh. 10 - Describe how meiosis provides for genetic...Ch. 10 - Define nondisjunction, and describe common...Ch. 10 - Many plants car. reproduce sexually or asexually....
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
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- A company that offers PGD terms an embryo “normal and healthy” if it has 46 chromosomes. Why is this statement misleading? , Two famous male actors had twins using a surrogate mother who carried two embryos that hadbeen fertilized in vitro, one with one man’s sperm and the other with the other man’s sperm. In terms of genetics, how closely are the babies, a boy and a girl, related to each other if they have different fathers?arrow_forwardWe say that genes that are close together on the same chromosome are linked. What does that mean? Imagine that in a diploid nucleus, one chromosome has the allele R and right next to it on the same chromosome is the allele T for a different gene. Are these linked? Imagine that r is right next to t on the homologous chromosome. If this cell never undergoes meiosis, does this matter at all? If it does undergo meiosis, what are the two genotypes that the gametes are most likely to have? Look at Figure for help if you need it.arrow_forwardHuman sex chromosomes are XX for females and XY for males. a. With respect to an X-linked gene, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele? c. If a female is heterozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele?arrow_forward
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