If you identify a trait that is experiencing stabilizing selection what is the most likely prediction for the genotype distribution of this trait?
Added by Tammy R.
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This type of selection tends to maintain the population at an optimal intermediate value. Show more…
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1a) A population of goats is affected by a malformation that causes goats to grow an extra tail. That condition is controlled by a single gene T with three alleles t1, t2, and t3. Goats with the t3/t3 genotype have an extra tail; all other genotypes are phenotypically normal. The frequency of goats with 2 tails is 1 in 100 individuals. Assume the population was at a Hardy-Weinberg equilibrium, what would be the frequency of the t3 allele? Write the answer as a frequency between zero and one. For example, if you think the answer is 56%, write 0.56; or if you think it is 1 in 100, write 0.01. 1b) If the population wasn't at a Hardy-Weinberg equilibrium, what would be the frequency of t3? A) It is at most 1 in 100. B) None are correct. C) Any value is possible. D) About 1 in 100. 1c) If an extra tail confused hunters and made them miss shots at a higher rate than when they target normal goats, what consequence would that have on the population? a) The population would undergo a bottleneck. b) The population would not be at a Hardy-Weinberg equilibrium. c) The population undergoes neutral drift. d) Alleles t1 or t2 would be more likely to be fixed.
Katlin K.
Jennifer S.
Suppose that a modern geneticist grows the same variety of garden peas that Gregor Mendel did. She randomly selects a single pea from 10 plants in her test garden and quantifies the alleles at a single locus. The frequency of heterozygotes in this first generation of 10 peas equals 0.70. She plants these peas and then selects 10 more peas from this population. She repeats this process two more times so that she has the original population, generation 1, and three successive generations of plants, generations 2, 3, and 4. Using Wright’s equation, predict the frequency of heterozygotes in generations 2, 3, and 4. Assume that the only evolutionary mechanism affecting heterozygosity is genetic drift. Express each frequency to two decimal places. frequency of heterozygotes in generation 2: 0.68 frequency of heterozygotes in generation 3: 0.67 frequency of heterozygotes in generation 4: 0.66
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