Any help will be greatly appreciated Use the following passa

Use the following passage to answer the next three questions. It has been hypothesized that people who are heterozygous for the allele that causes the deadly genetic condition cystic fibrosis (which, among other symptoms, reduces fertility) are more resistan to the deadly disease tuberculosis. Q5.8. If the cystic fibrosis allele protects against tuberculosis the same way the sickle-cell allel protects against malaria, then which of the following should be true of a comparison between regions with and without tuberculosis? cystic fibrosis deaths should be more common in regions with tuberculosis. cystic fibrosis deaths should be less common in regions with tuberculosis. cystic fibrosis deaths should be equally common in both types of regions. Regional differences in the cystic fibrosis death rate should be purely random and unpredictable.

Solution

5.8 The answer is Cystic fibrosis deaths should be common in both types of regions.

Cystic fibrosis gives resistance against tuberculosis, but the opposite is not correct. So cystic fibrosis death can occur in both regions.

5.9 The answer is the cystic fibrosis allele should increase to a relatively high frequency because heterozygotes will allele will be more likely to survive.

The heterozygote being more resistant to the disease will be able to proliferate and also transfer this gene into the population.

5.10 The answer is the allele frequency should steadily decrease due to natural selection.