#Question id: 3369
#Unit 11. Evolution and Behavior
Genetic drift refers to random changes in allele frequencies over time leads to following consequence
a. Loss of genetic diversity per generation
b. change in allelic frequency just by chance
c. It caused adaptive evolution
d. It one allele may reach to 0 frequency
#Question id: 3370
#Unit 11. Evolution and Behavior
One thousand independent populations of Drosophila are established with 25 individuals in each population, of which, one individual is of Aa genotype and the other nine are of AA genotype. If random genetic drift is the only mechanism acting on these populations, then, after a large number of generations, the expected number of populations fixed for the "a" allele is
#Question id: 3371
#Unit 11. Evolution and Behavior
If a given gene in a randomly mating population has three alleles a, b and c in the ratio of 0.6, 0.3 and 0.1 respectively, what is the expected frequency of all heterozygote?
#Question id: 3372
#Unit 11. Evolution and Behavior
Fish, penguin and Dolphin are independently evolved similar traits as a result of having to adapt to similar environments or ecological niches.
A. On a molecular level, this can happen due to random mutation in unrelated taxon to adaptive changes
B. This is the example of divergent evolution, occurred due to similar group of organisms inhabiting different environments
C. Similar phenotype are produced by identical change in orthologous gene
D. This is the example of convergent evolution, occurred due to similar group of organisms inhabiting different environments
Which of the following is the correct combination?
#Question id: 3373
#Unit 11. Evolution and Behavior
Which of the following is correct statement?
A. Reproduction alone does not alter allelic or genotypic frequencies from generation to generation
B. Frequency of the heterozygote is always greatest when allelic frequencies are range between .33 and .66
C. Inbreeding is more likely to take place in nature when population size becomes very small and the number of mates is limited.
D. The movement of a few individuals between populations can counteract the effects of genetic drift
#Question id: 3374
#Unit 11. Evolution and Behavior
Consider an autosomal locus with two alleles A1 and A2 at frequencies of 0.6 and 0.4 respectively. Each generation, A1 mutates to A2 at a rate of μ = 1 x 10-2 while A2 mutates to A1 at a rate of υ = 1 x 10-1) Assume that the population is infinitely large and no other evolutionary force is acting. The overall change in allelic frequency will be