Genetics: From Genes to Genomes, 5th edition
5th Edition
ISBN: 9780073525310
Author: Leland H. Hartwell, Michael L. Goldberg, Janice A. Fischer, Leroy Hood, Charles F. Aquadro
Publisher: McGraw-Hill Education
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Chapter 2, Problem 12P
Imagine you have just purchased a black stallion of unknown genotype. You mate him to a red mare, and she delivers twin foals, one red and one black. Can you tell from these results how color is inherited, assuming that alternative alleles of a single gene are involved? What crosses could you do to work this out?
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Students have asked these similar questions
*Ms. Libby Davison bought three Congo Lily bulbs at a flower show after she
was told they were each from different inbred lines. One had red flowers, on
yellow flowers, and one white flowers. She determined that flower color was
controlled by three alleles at a single gene. Red was found to be codominant
with yellow, and both alleles dominant to white. Some of the crosses she made
and the resulting progeny are listed below:
Progeny
All red
Cross
Red (selfed)
Yellow (selfed)
White (selfed)
Red x yellow
Yellow x white
Red x white
Orange (selfed)
1 red: 2 orange: 1 yellow
a. Designate each allele with an appropriate gene symbol.
All yellow
All white
All orange
All yellow
All red
b. Identify all possible genotypes of the following phenotypes
i. Red
ii. Yellow
Taken from Introduction to genetic analysis 7 edition. 1999. Griffiths et al. Chapter 4.
iii. White
iv. Orange
c. Determine the expected phenotypes and their ratios in the progeny from each
of the following crosses.
i. Orange x white…
You are working for a parakeet breeder that has some green birds and some blue birds. You
want to determine which feather color is dominant. You cross a blue male to each of two
green females. In the first cross, the blue male is crossed to a green female named Gabby,
resulting in 2 green and 2 blue offspring. In the second cross, the same blue male is
crossed to a green female named Gail, resulting in 5 green offspring. Based on these
results:
●
[Select]
phenotype is dominant.
• Gail's genotype is [Select]
The cross between the male and Gabby is called a [ Select]
cross.
A man crosses two pink-flowered four o’clock and obtains seeds which grow into plants bearing the following flower colors: 24 red, 53 pink, and 26 white. From these results, indicate how these colors are inherited and show a diagram of the cross.
Chapter 2 Solutions
Genetics: From Genes to Genomes, 5th edition
Ch. 2 - For each of the terms in the left column, choose...Ch. 2 - During the millennia in which selective breeding...Ch. 2 - Describe the characteristics of the garden pea...Ch. 2 - An albino corn snake is crossed with a...Ch. 2 - Two short-haired cats mate and produce six...Ch. 2 - Piebald spotting is a condition found in humans in...Ch. 2 - As a Drosophila research geneticist, you keep...Ch. 2 - A mutant cucumber plant has flowers that fail to...Ch. 2 - In a particular population of mice, certain...Ch. 2 - In humans, a dimple in the chin is a dominant...
Ch. 2 - Among Native Americans, two types of earwax...Ch. 2 - Imagine you have just purchased a black stallion...Ch. 2 - If you roll a die singular of dice, what is the...Ch. 2 - Prob. 14PCh. 2 - How many genetically different eggs could be...Ch. 2 - What is the probability of producing a child that...Ch. 2 - Prob. 17PCh. 2 - Galactosemia is a recessive human disease that is...Ch. 2 - Albinism is a condition in which pigmentation is...Ch. 2 - A cross between two pea plants, both of which grew...Ch. 2 - A third-grader decided to breed guinea pigs for...Ch. 2 - The self-fertilization of an pea plant produced...Ch. 2 - Prob. 23PCh. 2 - A pea plant from a pure-breeding strain that is...Ch. 2 - Prob. 25PCh. 2 - A pea plant heterozygous for plant height, pod...Ch. 2 - In the fruit fly Drosophila melanogaster, the...Ch. 2 - Prob. 28PCh. 2 - Considering the yellow and green pea color...Ch. 2 - Prob. 30PCh. 2 - Prob. 31PCh. 2 - Prob. 32PCh. 2 - For each of the following human pedigrees,...Ch. 2 - Consider the pedigree that follows for cutis laxa,...Ch. 2 - A young couple went to see a genetic counselor...Ch. 2 - Huntington disease is a rare fatal, degenerative...Ch. 2 - Is the disease shown in the following pedigree...Ch. 2 - Figure 2.22 shows the inheritance of Huntington...Ch. 2 - Prob. 39PCh. 2 - People with nail-patella syndrome have poorly...Ch. 2 - Midphalangeal hair hair on top of the middle...Ch. 2 - A man with Huntington disease he is heterozygous...Ch. 2 - Explain why disease alleles for cystic fibrosis CF...
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