Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 13, Problem 9GP
Red-flowering snapdragons are homozygous for allele RI. White-flowing snapdragons are homozygous for a different allele (R2). Heterozygous plants (R1 R2) bear pink flowers. What
- a. R1R1 × R1R2
- b. R1R1 × R2R2
- c. R1R2 × R1R2
- d. R1R2 × R2R2
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Red-flowering snapdragons are homozygous for allele R1. White-flowering snapdragons are homozygous for a different allele (R2). Heterozygous plants (R1R2) bear pink flowers. What phenotypes should appear among first-generation offspring of the crosses listed? What are the expected proportions for each phenotype? a. R1R1 × R1R2 c. R1R2 × R1R2 b. R1R1 × R2R2 d. R1R2 × R2R
The genes for tall vine D and yellow seed G, are dominant over their respective alleles for dwarf d and green g. What phenotypes are expected from each of the following crosses? Include phenotypic and genotypic ratio. Use Punnet square to show the ff. Crosses.
a. Heterozygous tall, homozygous yellow X Homozygous Tall, heterozygous yellow.
b. Homozygous Dwarf, heterozygous yellow X Heterozygous tall, homozygous green
Leaf color and stem length in a certain species of diploid flowers are controlled
separately by the R and S locus. The R allele (dominant) results in red leaves while r
results in yellow leaves. S (dominant) results in short stems and s results in long stems.
A cross is performed between a true breeding long-stemmed red plant and a true
breeding short- stemmed yellow plant.
a. What is the genotype and phenotype of the resulting F1 plants?
b. The resulting F1 plants are crossed with long-stemmed plants with yellow leaves.
100 offspring are collected from this cross, and the following phenotype counts
are observed.
phenotype
long red
short red
count
43
8
long yellow
short yellow
40
What are the corresponding genotypes for each of the four classes of the offspring from
this cross?
c. Using the information above, determine the genotype of the gametes contributed by
"parent A" to each of the resulting offspring. Label the gamete types as parental or
nonparental.
Chapter 13 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 13 - Prob. 1DAACh. 13 - Prob. 2DAACh. 13 - Prob. 3DAACh. 13 - Prob. 1SQCh. 13 - An organisms observable traits constitute its...Ch. 13 - Prob. 3SQCh. 13 - Prob. 4SQCh. 13 - The offspring of the cross AA aa are ________. a....Ch. 13 - Refer to question 5. Assuming complete dominance,...Ch. 13 - A testcross is a way to determine ________. a....
Ch. 13 - Assuming complete dominance, a cross between...Ch. 13 - The probability of a crossover occurring between...Ch. 13 - True or false? All traits are inherited in a...Ch. 13 - One gene that affects three traits is an example...Ch. 13 - The phenotype of individuals heterozygous for...Ch. 13 - _______ in a trait is indicated by a bell curve....Ch. 13 - Match the terms with the best description. ______...Ch. 13 - Mendel crossed a true-breeding pea plant with...Ch. 13 - Assuming that independent assortment occurs during...Ch. 13 - Refer to problem 2. Determine the predicted...Ch. 13 - For each genotype listed, what allele combinations...Ch. 13 - Prob. 5GPCh. 13 - Suppose you identify a new gene in mice. One of...Ch. 13 - Mutations in the TYR gene may render its enzyme...Ch. 13 - In sweet pea plants, an allele for purple flowers....Ch. 13 - Red-flowering snapdragons are homozygous for...
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