Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780134433769
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman
Publisher: PEARSON
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Chapter 21, Problem 2TYU
No two people are genetically identical, except for identical twins. The main source of
- A. new mutations that occurred in the preceding generation.
- B. genetic drift.
- C. the reshuffling of alleles in sexual reproduction.
- D. environmental effects.
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A gene pool is
a. all of the genes in a single individual.
b. all of the genes in the gametes from a single individual.
c. all of the genes in a population of individuals.
d. the random mixing of genes during sexual reproduction.
Sexual reproduction provides an advantage to organisms because it increases the
A.
size of the genome of a species.
B.
genetic variability in a population.
C.
fitness of individual alleles of a gene.
D.
number of mutations during cell division.
Identify the most accurate statement about population variation.
a.
Allopolyploidy occurs when chromosomes fail to separate during gametogenesis and then self-fertilization results in a tetraploid offspring.
b.
Chromosomal duplications and deletions cause large changes due to the changes in gene dosage.
c.
Traits that are influenced by both environment and genetics are unlikely to be influenced by evolution.
d.
Gene duplications and deletions occur frequently during equal crossing over that occurs during meiosis I.
Chapter 21 Solutions
Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
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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