Essentials of Genetics (9th Edition) - Standalone book
9th Edition
ISBN: 9780134047799
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 25PDQ
When working out genetics problems in this and succeeding chapters, always assume that members of the P1 generation are homozygous, unless the information or data you are given require you to do otherwise.
Two true-breeding pea plants are crossed. One parent is round, terminal, violet, constricted, while the other expresses the contrasting
(a) What conclusion can you draw about the inheritance of these traits based on the F1 results?
(b) Which phenotype appears most frequently in the F2 results? Write a mathematical expression that predicts the frequency of occurrence of this phenotype.
(c) Which F2 phenotype is expected to occur least frequently? Write a mathematical expression that predicts this frequency.
(d) How often is either P1 phenotype likely to occur in the F2 generation?
(e) If the F1 plant is testcrossed, how many different phenotypes will be produced?
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When working out genetics problems in this and succeeding chapters, always assume that members of the P1 generation are homozygous, unless the information or data you are given require you to do otherwise.HOW DO WE KNOW? we focused on the Mendelian postulates, probability, and pedigree analysis. We also considered some of the methods and reasoning by which these ideas, concepts, and techniques were developed. On the basis of these discussions,
what answers would you propose to the followingquestion.
Question: Since experimental crosses are not performed in humans, how do we know how traits are inherited?
Required information
A single-factor cross is one in which the inheritance of only one character and its associated genotypes are followed.
Punnett squares are often used to predict the outcomes of simple genetic crosses. Based on Mendel's laws, the
genotypes of the parents can be used to predict the genes in their gametes and the resulting progeny. A Punnett square
enables you to predict the types of offspring the parents are expected to produce and in what proportions.
Sickle cell anemia is a recessive trait in humans. In a cross between two parents who are heterozygous for the gene, what are the gamete possibilities of the parer
Mother's gamete
possibilities
Father's gamete
possibilities
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Monohybrid practice problems
In pea plants, the traits below exhibit the following dominance patterns:
Recessive
Expression:
Wrinkled
Dominant
Expression:
Round
Purple
|Yellow
Inflated
Green
Trait:
1. Seed shape (R)
2. Flower color (P)
3.
White
Green
Constricted
Yellow
Terminal
Short
Color of seed coat (Y)
Form of ripe pods (I)
4.
5.
|Color of unripe pods (G)
6.
Position of flowers (A)
7. Length of stem (T)
Axial
Tall
Record the genotypes for pea plants with the following descriptions (The first one has been done for
you:
1.
а. дg
A plant with yellow pods
A planteozygous for ereen pods
С.
A plant homozvaoue ta vellow seeds
A plant with white flowers
A plant with areen seeds
2. Complete the Punnett Square showing the cross between a pea plant with pure round seeds and a
plant with wrinkled seeds. Summarize the phenotypes and genotypes for the offspring.
Parental cross
Genotypic Percentages:
Phenotypic Percentages:
3. A pea plant with pure yellow…
Chapter 3 Solutions
Essentials of Genetics (9th Edition) - Standalone book
Ch. 3 -
CASE STUDY | To test or not to test
Thomas...Ch. 3 -
CASE STUDY | To test or not to test
Thomas...Ch. 3 - CASE STUDY | To test or not to test Thomas first...Ch. 3 -
CASE STUDY | To test or not to test
Thomas...Ch. 3 - When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...
Ch. 3 - When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 - Prob. 26PDQCh. 3 -
When working out genetics problems in this and...
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