II. Short Answer 5. In a population of Noumea varians (a nudibranch), a gene tha
ID: 184650 • Letter: I
Question
II. Short Answer 5. In a population of Noumea varians (a nudibranch), a gene that you think regulates the sequestration of a noxious chemical, and that knakes this species unpalatable (bad tasting, when eaten by a predator), has two alleles Al and A2. You think that the Al allele confers this trait, and is favored by natural selection. Use this sample: Number of individuals 60 98 42 to calculate the expected numbers of genotypes under the expectation of Hardy-Weinberg equilibrium. Is your answer consistent with this hypothesis? 15 points Please note that for exams you may only bring a non-programmable calculatorExplanation / Answer
Hardy-Weinberg equilibrium states that the amount of genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.
To explore the Hardy-Weinberg equation, we can examine a simple genetic locus at which there are two alleles, A1 and A2. The Hardy-Weinberg equation is expressed as:
p2 + 2pq + q2 = 1
where p is the frequency of the "A" allele and q is the frequency of the "A2" allele in the population. In the equation, p2 represents the frequency of the homozygous genotype A1A1, q2 represents the frequency of the homozygous genotype A2A2, and 2pq represents the frequency of the heterozygous genotype A1A2. In addition, the sum of the allele frequencies for all the alleles at the locus must be 1, so p + q = 1. If the p and q allele frequencies are known, then the frequencies of the three genotypes may be calculated using the Hardy-Weinberg equation. In population genetics studies, the Hardy-Weinberg equation can be used to measure whether the observed genotype frequencies in a population differ from the frequencies predicted by the equation.
Out of 200 total chromosome copies. The frequency p of the A1 allele is p = 123/200 = 0.615, and the frequency q of the A2 allele is q = 87/200 = 0.435
p + q =1.
thus answer is consistent with this hypothesis