Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 16, Problem 6EQ
Summary Introduction
To review:
The phenotypic results of the F3 (Filial 3) generation.
Introduction:
Epigenetics are the mechanisms that lead to changes in gene expression from one generation to another.These changes are called epigenetic inheritances.Paramutation is kind of epigenetics where one allele induces the change of allele expression in the other allele and the changes are heritable in nature.
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In tomatoes, the red fruit color is completely dominant to yellow. Suppose a tomato plant homozygous for red is crossed with one homozygous for yellow and the progeny are allowed to self pollinate. What phenotypes do you predict in the F2 generation?
a) 3 red: 1 yellow
b) 9 red : 3 orange : 1 yellow
c) 1 red : 2 orange : 1 yellow
d) 1 red : 1 yellow
three recessive genes a, b, and c in the model plant Arabidopsis are found to be linked on chromosome 4. A three point test cross is done with a homozygous recessive plant with a heterozygous for all three genes. Following is the number of progenies
a b C 65
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A B C 1267
a b c 1310
A b C 550
a B c 515
a B C 470
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Total = 4,722
Determine the middle locus by your choice of method and after that calculate the map distance between the genes in map unit (m.u.).
Two haploid strains of S. cerevisae (yeast) are crossed. One has the genotype ABC and the other abc. Five sets of the resultant tetrads are noted below. In which set did a gene conversion event occur? Look for a 1:3 or 3:1 ratio
A) abc, aBc, AbC, aBC a/A is 3 recessive 1dominant, B/b is 2:2, same for C B) abc, abc, ABC, ABC 2:2 for all C) aBc, aBc, AbC, AbC 2:2 for all D) abC, abc, ABc, ABC this one has equal ratio of dominant/recessive 2 dominant C’s, 2 Recessive c, same form A and a and B and b. E) Abc, Abc, aBC, aBC
Chapter 16 Solutions
Genetics: Analysis and Principles
Ch. 16.1 - Which of the following are examples of molecular...Ch. 16.1 - 2. An epigenetic modification to a specific gene...Ch. 16.1 - Prob. 3COMQCh. 16.1 - Epigenetic changes may a. be programmed during...Ch. 16.2 - 1. For the Igf2 gene, where do de novo methylation...Ch. 16.2 - 2. For XCI to occur, where are the Xist and Tsix...Ch. 16.2 - 3. Which of the following possibilities could...Ch. 16.3 - 1. Which of the following statements about...Ch. 16.3 - The effects of paramutation may vary with regard...Ch. 16.4 - 1. When mice carrying theallele exhibit a darker...
Ch. 16.4 - 2. If the VIN3 gene had a loss-of-function...Ch. 16.5 - Prob. 1COMQCh. 16.5 - Prob. 2COMQCh. 16 - Prob. 1CONQCh. 16 - List and briefly describe five types of molecular...Ch. 16 - Prob. 3CONQCh. 16 - What is the key difference between cis and...Ch. 16 - Prob. 5CONQCh. 16 - Prob. 6CONQCh. 16 - 7. Outline the molecular steps in the process of...Ch. 16 - Prob. 8CONQCh. 16 - 9. In general, explain how epigenetic...Ch. 16 - 10. What are the contrasting roles of trithorax...Ch. 16 - Describe the molecular steps by which polycomb...Ch. 16 - Prob. 12CONQCh. 16 - Using coat color in mice and the development of...Ch. 16 - How can environmental agents that do not cause...Ch. 16 - Prob. 15CONQCh. 16 - Prob. 16CONQCh. 16 - Explain how the VIN3/PRC2 complex specifically...Ch. 16 - Prob. 1EQCh. 16 - In the experiments described in Figure 16.8,...Ch. 16 - Prob. 3EQCh. 16 - A research study indicated that an agent in...Ch. 16 - Lets suppose you were interested in developing...Ch. 16 - Prob. 6EQCh. 16 - Prob. 7EQCh. 16 - 2. Discuss the similarities and differences of...
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