Question

In the gene pool of a population with 132 individuals, a fixed allele for a particular genetic locus has a frequency of Select one: O a. 1 O b. More information is needed to determine this. O c. 0.75 O d.o O e. 0.5

Answer 1

Question 1: Answer is option a.

When the allele is fixed it is said that all of the members of the population has the 100% similar allele. So, the allele frequency would be 1.

Question 2: Answer is option f.

Sexual selection has a great role to play in sexual reproduction in the population. It selects the males or females based on sexual dimorphic characters.

Question 3: Answer is option e.

According to Hardy-weinberg principle, the allelic frequencies will remain constant over generation after generation. So, if there is change in allele frequencies, then the population must be evolving.

Question 4: Answer is option C.

This selection causes to reduce in the allele frequency that cause small size whereas increase in the allele frequency that cause large and medium size.

Question 5: Answer is option e.

When both advantage and disadvantage caused by mutations are equal then there is no net effect of mutation on the population.

Question 6: Answer is option d.

40% of the population carry D1 allele. So, rest 60% of the population carry D2 allele. So, D1 allele frequency is 0.4 and D2 allele frequency is 0.6

So, the percent of population carry both D1 and D2 alleles is = 2*0.4*0.6*100% = 48%

Question 7: Answer is option C.

Question 8: Answer is option C.

Stabilization selection helps to increase in the heterozygous phenotype which is the intermediate phenotype.

Question 9: Answer is option b.

Movement of population between two populations reduces the genetic differences between them.