BIOLOGY (LL)
5th Edition
ISBN: 9781264115495
Author: BROOKER
Publisher: MCG
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Chapter 23.2, Problem 3CC
Summary Introduction
To determine: The fate of frequencies of HA and HS alleles over the long run if malaria was completely eradicated.
Introduction: The prevalence of malaria depends on the homozygous and heterozygous nature of HA and HS alleles. In areas where malaria becomes endemic, population show homozygous nature for HA allele and depicts lower mean fitness.
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Applying the Hardy-Weinberg equilibrium. In a population of flowers, the following color distribution was noted: 36% red (RR), 48% brown-red (Rr), and 16% fuschia (rr). What will be the distribution of genotypes in the next generation?
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Chapter 23 Solutions
BIOLOGY (LL)
Ch. 23.1 - Prob. 1CSCh. 23.2 - Prob. 1CCCh. 23.2 - Prob. 2CCCh. 23.2 - Prob. 3CCCh. 23.3 - Prob. 1CCCh. 23.3 - Prob. 1EQCh. 23.3 - Prob. 2EQCh. 23.3 - Prob. 3EQCh. 23.4 - Genetic Drift Concept Check: How does the...Ch. 23.4 - Prob. 1CS
Ch. 23.5 - Prob. 1CCCh. 23 - Population geneticists are interested in the...Ch. 23 - The Hardy-Weinberg equation characterizes the...Ch. 23 - Prob. 3TYCh. 23 - Prob. 4TYCh. 23 - Prob. 5TYCh. 23 - Prob. 6TYCh. 23 - Prob. 7TYCh. 23 - Prob. 8TYCh. 23 - Kimuras proposal regarding neutral variation...Ch. 23 - Populations that experience inbreeding may also...Ch. 23 - Prob. 1CQCh. 23 - Prob. 2CQCh. 23 - Prob. 3CQCh. 23 - Antibiotics are commonly used to combat bacterial...Ch. 23 - Discuss die similarities and differences among...
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- for round 1. How many generations did it take for an allele to become fixed in the population? (See the number of generations on the X axis of your graph). for wrinkled 2. How many generations did it take for an allele to become fixed in the population? (See the number of generations on the X axis of your graph). Discuss the difference in the number of generations it took for your alleles to be fixed when you were selecting for round peas vs wrinkled peas. Which took more generations? How big was the difference? What do you think is the reason for this difference?arrow_forwardRecall that the Hardy-Weinberg model makes the following assumptions: No mutations Extremely large population No gene flow No selection You score flower colour in a very large natural population where flower colour is a co-dominant trait where white and red are homozygotes (CWCW and CRCR) and pink are heterozygotes (CWCR). Taking your observed phenotypes and genotypes, you apply the Hardy-Weinberg principle and find an excess of homozygous individuals (that is, individuals with either white or red flowers). Give two plausible explanations for this excess of homozygotes in the natural population.arrow_forwardGive typed full explanationarrow_forward
- House mouse (Mus musculus) Gene of interest: B4galnt2 (encodes glycosyltransferase enzyme) • Allele R: Associated with prolonged bleeding due to issues with blood clotting; associated with resistance to bacterial infections due to absence of intestinal expression. Allele C: Associated with increased susceptibility to bacterial infections; not associated with prolonged bleeding. A B C The population is closed; there are no new mice coming in. The cages are setup to allow for random mating. The B4galnt2 gene is not associated with any mating preferences or non-random mating patterns. Studies have shown that mutations in this locus are extremely rare. The population is EXTREMELY large. The population is kept in well maintained environment, free of bacterial infections. The mouse food is supplemented with a low dose of blood coagulator, which helps the blood clot and eliminates any prolonged bleeding. None of the genotypes display any side effects to this medication. The population is…arrow_forwardPrezygotic Isolating Mechanisms: Behavioral isolation canprevent individuals of different species from mating. Explorehow sexual selection contributes to behavioral reproductiveisolation. Explain your answer in a well defined manner.arrow_forwardDescribe the effect of malaria on the frequency of the HbS allele in areas where malaria is common:In areas with malaria, which individual would survive better and leave more offspring- an individual with two HbA alleles or an individual with one HbA allele and one HbS allele? Given this, would you expect the HbS allele to be common or rare in populations living with malaria?arrow_forward
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