EBK CAMPBELL BIOLOGY IN FOCUS
2nd Edition
ISBN: 8220101459299
Author: Reece
Publisher: PEARSON
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Textbook Question
Chapter 21, Problem 4TYU
If the
- A. gene variability =0%; number of alleles = 0
- B. gene variability = 0%; number of alleles = 1
- C. gene variability = 0%: number of alleles = 2
- D. gene variability > 0%; number of alleles = 2
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Students have asked these similar questions
A meadow is home to a population of plants of a particular species. Among these individuals are 125 plants that have red flowers and 375 plants that have white flowers. The allele of the flower color gene that produces red flowers (R) is completely dominant over the white flower color allele (r).
Approximately what percent of the plants in the meadow would be expected to have the Rr genotype?
a- 23%
b- 33%
c- 2%
d- 76%
Answer the following questions:
a. A gene has 2 alleles, R and B. List the possible genotypes.
b. If there are 40 individuals in a population and all 40 have the
genotype RB, what is the frequency of the R allele?
c. If there are 40 individuals in a population and 10 are RR, 20
are RB, and 10 BB, what is the frequency of the R allele?
d. If there are 40 individuals in a population and 10 are RR, 10
are RB, and 20
BB, what is the frequency of the R allele?
If 120 of 200 alleles are dominant alleles, then what percentage of the alleles are dominant alleles?
A-12%
B-40%
C-60%
D-120%
What percentage of the alleles are recessive alleles?
E-8%
F-40%
G-60%
H-80%
Which of the terms of the Hardy-Weinberg equations represents the frequency of the recessive allele in the gene pool?
A-p^2
B-p
C-2pq
D-q^2
Chapter 21 Solutions
EBK CAMPBELL BIOLOGY IN FOCUS
Ch. 21.1 - Explain why genetic variation within a population...Ch. 21.1 - Of all the mutations that occur in a population,...Ch. 21.1 - Prob. 3CCCh. 21.2 - A population has 700 individuals, 85 of genotype...Ch. 21.2 - The frequency of allele a is 0.45 for a population...Ch. 21.2 - WHAT IF? A locus that affects susceptibility to a...Ch. 21.3 - In what sense is natural selection more...Ch. 21.3 - Distinguish genetic drift from gene flow in terms...Ch. 21.3 - WHAT IF? Suppose two plant populations exchange...Ch. 21.4 - What is the relative fitness of a sterile mule?...
Ch. 21.4 - Explain why natural selection is the only...Ch. 21.4 - Prob. 3CCCh. 21 - Natural selection changes allele frequencies...Ch. 21 - No two people are genetically identical, except...Ch. 21 - Sparrows With average-sized w1ngs survive severe...Ch. 21 - If the nucleotide variability of a locus equals...Ch. 21 - There are 25 individuals in population 1, all with...Ch. 21 - A fruit fly population has a gene with two...Ch. 21 - FOCUS ON EVOLUTION Using at least TWO examples,...Ch. 21 - Prob. 9TYUCh. 21 - SYNTHESIZE YOUR KNOWLEDGE This kettle lake formed...
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