The persistence of sickle-cell anemia in a population with a high incidence of malaria is a case of______ . a. bottlenecking c. the founder effect b. inbreeding d. a balanced polymorphism
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The persistence of sickle-cell anemia in a population with a high incidence of malaria is a case of______ .
a. bottlenecking c. the founder effect
b. inbreeding d. a balanced polymorphism
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- 1b.) Which is NOT commonly an effect of inbreeding in a population? a. an increase in the frequency of homozygous dominant individuals b. an increase in the frequency of homozygous recessive individuals c. an increase in the frequency of recessive genetic diseases d. better health and fertility of inbreds lines compared to lines that are not inbred.A farmer performs truncation selection to try to increase the weight of peaches in his orchard. Which statement correctly describes a possible outcome of this selection? a) If peach weight is not heritable, the average weight in the next generation will increase. b) If peach weight is heritable, the average weight in the next generation will increase. c) The average peach weight will decrease due to this inbreeding. If peach weight is heritable, the average weight in the next generation will decrease.Issues with inbreeding often occurs with dog breeds, such as German shepherds. How can we the best describe inbreeding? a. successive breeding with individuals from a variety of populations b. successive breeding within individuals from within one population c. breeding between different breeds to produce new breeds d. breeding the same set parents more than once
- Population genetics is the study of: a. how selective forces change the allele frequencies in a population over time b. the genetic basis of population-wide traits c. whether traits have a genetic basis d. the degree of inbreeding in a populationInbreeding is sexual reproduction between individuals that are a. homozygous. b. heterozygous. c. part of the same genetic lineage. d. both a and c.Genetic drift can be defined as Group of answer choices A. accidental changes in DNA structure b.how lazy loci evolve c. random change in allele frequency over time D. differences in fitness between alleles
- A. Explain which force of evolution is seen here by a hybrid bird landing on an island that is not its home and breeding with the indigenous population. B. Explain which force of evolution randomly chooses an individual from a larger gene pool to form a new, smaller population with less genetic variety.Heterosis is a) the appearance of spontaneous mutations. b) a method of artificial breeding that reduces heterozygosity. c) caused by inbreeding. d) when offspring have a phenotypic improvement over their parents.Population genetics is the study of ________. a. how allele frequencies in a population change over time b. populations of cells in an individual c. the rate of population growth d. how genes affect embryological development
- The continued presence of the allele that causes sickle cell anemia in areas where falciparum malaria is prevalent demonstrates which of the following phenomena? (a) inbreeding depression (b) frequency-dependent selection (c) heterozygote advantage (d) genetic drift (e) a genetic bottleneckMigration of individuals from a mainland population to a unique island population will result in… a. homogenization of allele frequencies between the two populations. b. isolation and bottleneck effect. c. increased homozygosity in both populations. d. increased population differentiation between the two populations.In population genetics, evolution describes how ____ change from onegeneration to the next.a. individuals c. phenotype frequenciesb. allele frequencies d. communities