CAMPBELL BIOLOGY IN FOCUS-TEXT,AP ED.
3rd Edition
ISBN: 9780136811206
Author: Urry
Publisher: SAVVAS L
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Chapter 21, Problem 5TYU
A fruit fly population has a gene with two alleles, A1 and A2. Tests show that 70% of the gametes produced in the population contain the A1 allele. If the population is in Hardy- Weinberg equilibrium, what proportion of the flies carry both A1 and A2?
- A. 0.7
- B. 0.49
- C. 0.42
- D. 0.21
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In achondroplastic dwarfism, an autosomal dominant disease, the gene is lethal in homozygotes. If the frequency of the normal allele is 0.99, what is the heterozygote frequency?
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An autosomal recessive gene is lethal in homozygotes. In a population at Hardy- Weinberg equilibrium, how many generations will it take to eliminate the gene from the population
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The allele frequency of C is 0.4 and c is 0.6. If the population is in Hardy-Weinberg equilibrium, what is the frequency of heterozygotes?
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Chapter 21 Solutions
CAMPBELL BIOLOGY IN FOCUS-TEXT,AP ED.
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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