low are some different scenarios for the heritability of a trait and the selecti

Question

low are some different scenarios for the heritability of a trait and the selection differential in a population. Which scenario will produce the larges response to selection? (a) h2 0.9, S-0.6 (b) h' 0.5: S-0.9 (c) h'-0.2, S 0.1 (d) h405; S=0.5 9. In 1977, before the drought on Daphne major, the average beak depth in the finch population was 9.2 mm. Breeding parents that survived the drought had an average beak depth of 9.7 mm. The difference between these values represents (a) the response to selection (R) (b) the selection differential (S) (c) heritability (d) the mutation rate 10. Which of the following scenarios would provide evidence that an allele has experienced a selective sweep in the recent past? (a) The allele is at high frequency and linkage disequilibrium with surrounding loci is loww (b) The allele is at high frequency and linkage disequilibrium with surrounding loci is high (c) The allele is at low frequency and linkage disequilibrium with surrounding loci is high (d) The allele is at low frequency and linkage disequilibrium with surrounding loci is low 11. Analysis of allelic diversity in maize demonstrated that by 4400 years ago, maize had lost much of its genetic diversity. This loss of diversity can be explained by (a) genetic bottleneck (b) strong artificial selection (c) genetic drift (d) a and b are correct (e) a, b, and c are correct

Explanation / Answer

10. allele with high frequency and linkage distribution with surrounding loci high will indicate that the allele has experienced a selective sweep in the recent past.

11. Genetic drift is responsible for the loss of genetic diversity in Maize. This has led to change in the frequency of an existing gene variant in the maize crop due to random sampling of maize.

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