CAMPBELL BIOLOGY IN FOCUS-W/MASTR.BIO.
3rd Edition
ISBN: 9780134875040
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 21, Problem 3TYU
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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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
If both parents are recessive short, what is the phenotype in percentage (%) for the possible offspring? Use the reference sheet below to answer.
Chapter 21 Solutions
CAMPBELL BIOLOGY IN FOCUS-W/MASTR.BIO.
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 - Consider a population in which heterozygotes at a...Ch. 21 - Natural selection changes allele frequencies...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. 8TYUCh. 21 - SYNTHESIZE YOUR KNOWLEDGE This kettle lake formed...
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