In a population of finches undergoing roughly directional selection on the gene "A," the fitness of A1A1 individuals is 0.8, A1A2 individuals is 1, and A2A2 individuals is 1. The initial frequency of each allele is 0.5. What will be the new frequency of A1 after one generation of selection? (3rd decimal place is fine)

Assume you are studying a population of fire toads and want to predict what happens after a selection event. There is a freeze event. Before the freeze event you measured body size and found the average body size was 50 grams. After the freeze event you measured the surviving toads and their average body size was 70 grams. Based on your previous studies you know that the narrow-sense heritability is 0.5 What is the response to selection in this population?   a. 5 grams   b. 10 grams   c. 20 grams   d. None of the above

If the population is in Hardy-Weinberg equilibrium, what is the expected (projected) frequency of heterozygous cats in the next generation?   Question 4 options:   0.68   0.89   0.435   0.84

In a sample of 500 from a population there are 75 AA genotypes, 250 Aa genotypes, and 175 aa genotypes. What are the allele frequencies in this sample? 0.4 A, 0.6 a O 0.3 A, 0.7 a 0.2 A, 0.8 a O 0.5 A, 0.5 a

There are two existing hypotheses for an unusually high frequency of a deleterious recessive allele in a certain population other than it is hidden in the heterozygous genotype and not exposed to selection.  Explain what these two likely hypotheses are and how you could distinguish between them based on your understanding of the applicable assumptions that are part of the Hardy-Weinberg Equilibrium Model

Calculate allele frequencies for the allele that either prevents or permits “tongue rolling,” based on a human breeding population of 500,000 in the San Jose region. Typical 1407 class phenotypic data suggests the following genotypic frequencies present in this population:   Frequency of homozygous dominants (RR, the tongue rollers): 0.20 (20%) Frequency of homozygous recessives (rr, the non-rollers): 0.30 (30%) Frequency of heterozygous individuals (Rr, phenotypically tongue rollers): 0.50 (50%)   Total No. of alleles present: _____________   Number of dominant alleles possessed by homozygous dominants: _____________   Number of recessive alleles possessed by homozygous recessives: _____________   Number of dominant alleles possessed by heterozygotes: _____________   Number of recessive alleles possessed by heterozygotes: _____________   Total number of dominant alleles in the population: _____________   Frequency of the dominant allele (R) in the population: _____________   Frequency…

In a species of lily, the color of the flower's petals is determined by a dominant purple allele (F) or recessive white allele (f). One hundred flowers in Hardy-Weinberg equilibrium were sampled, and only 15% of the population showed the phenotype of white. Which of the following numbers represents the calculated value of the recessive white allele frequency? 0.92 0.39 0.15 0.85

You are investigating the gene for eye color in a population of Hawaiian Drosophila flies that is in a Hardy-Weinberg equilibrium. You then discover that the frequency of allele E in this population is 0.45. What are the expected genotype frequencies in this population? O A. EE = 0.55, Ee = 0.0, ee = 0.45 B. EE = 0.2025, Ee = 0.495, ee = 0.3025 %3| C. EE = 0.2025, Ee = 0.525, ee = 0.3025 D. EE = 0.3025, Ee 0.149, ee = 0.2025 %3D %3D Reset Selection

In a population with two alleles at the R locus (R and r), the frequency of the genotype rr is 0.24. Assuming that the R locus is at Hardy-Weinberg equilibrium in this population, what is the frequency of heterozygotes (Rr)? Round and report your answer to the second decimal place (0.00). Your Answer:

In a population experiencing no selection, genetic drift, gene flow, mutation or non random mating, the allele frequencies at a locus where the R allele is dominant over the r allele, are as follows. R= 0.3 r=0.7 What is the expected heterozygosity of the population at that locus?