Which of the following does NOT apply to genetic drift? O is not determined by beneficial traits can result in the loss of an allele affects small populations decreases genetic variation increases genetic variation
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- Over the last several decades, the scientific community has gathered a large amount of information regarding genetics and genetic variation. What is a main source that leads to increased genetic variation? Top of Form Selective breeding Chromosomal mutations Recombination Genetic driftWhich one of the following options most accurately describes the process that generates the signature of a selective sweep in DNA sequence data? suppression of mutation over a long haplotype centered on a positively selected allele genetic hitchhiking of neutral alleles flanking the favored allele at the nucleotide site under positive selection O higher than average recombination around the core allele under positive selectionThe reason spontaneous mutations do not have an immediate effect on allele frequencies in a large population is that: a. mutations are random events, and mutations may be eitherbeneficial or harmful. b. mutations usually occur in males and have little effect oneggs. c. many mutations exert their effects after an organism hasstopped reproducing. d. mutations are so rare that mutated alleles are greatlyoutnumbered by nonmutated alleles. e. most mutations do not change the amino acid sequence of aprotein.
- DNA _______. a. guides form b. is the basis of traits c. is transmitted from and function parents to offspring d. all of the aboveWhich of the following genotypes has the highest relative fitness (compared to other genotypes) in environments where there is NO malaria? A_AA B_AS C_SSWhat does it mean when an individual is found to be “homozygous” at a DNA profiling locus? They have three alleles at the locus They got different alleles from their mother and father They got the same alleles from their mother and father Their children got two alleles from them Their children got no alleles from them
- Which of the following is not true of Mendelian segregation? It is compatible with observations in real populations It can maintain rare alleles in a population It is compatible with Darwin's theory of evolution through natural selection It allows transmission of "hidden" genetic variation After many generations, it reduces heritable variation in a population.. Measurement of Trait From: "Why our flu vaccines can't keep up" Suppose that for one of the traits Bumpus measured, the data looked like the graph above. What is the name for this type of figure? Histogram O Line Graph Pic Chart Scatterplot Frequency in the Populationp + q = 1 p2 + 2pq + q2 = 1 p is the frequency of the dominant allele q is the frequency of the recessive allele p2 is the frequency of homozygous dominant genotype q2 is the frequency of homozygous recessive genotype 2pq is the frequency of heterozygous genotype Within a population of roses, the color red (R) is dominant over the color white (r). 40% of all the roses are white.a)The percentage of roses in the population that are heterozygous b) The frequency of homozygous dominant individuals =
- Which of the following is the LEAST CONVINCING argument against micromutationism? Advantageous mutations of large effect are more resistant to loss by drift than advantageous mutations of small effect. Mutations of small effect are more likely to be advantageous than mutations of large effect. Empirical studies suggest that some adaptive traits are governed at least in part by loci of large phenotypic effect.Define genetic drift and give three ways in which it can arise. Whateffect does genetic drift have on a population?population is black in colour but about 1/4 of them are white. gene (B) that produces an enzyme that converts a pigment molecule to produce the Black colour. There are 2 alleles of this gene - the dominant B and the recessive b. DNA analysis shows that black individuals have either a BB or Bb genotype and that white individuals have a bb phenotype. However, you have discovered that a small percentage of White individuals have either a BB or Bb genotype. Explain two reasons that could explain this apparent anomaly. They have a BB or Bb genotype but a white phenotype.