Dog breeders maintain the purity of breeds by keeping dogs of different breeds apart when they are fertile. This kind of isolation is most similar to which of the following reproductive isolating mechanisms?

#Question id: 3255

#Section 3: Genetics, Cellular and Molecular Biology

The body weight of offspring of bird species is range between 12 gm to 18 gm. In a laboratory experiment, species was subjected to selection pressure having influence on the offspring body weight. After many generations of experimental selection pressure, the body weight range between 16 gm to 24 gm. Which of the following natural selection operate on this species?

#Question id: 3256

#Section 3: Genetics, Cellular and Molecular Biology

There are three alleles, A1, A2, and A3, whose frequencies are equal abundance. According the Hardy-Weinberg equilibrium

#Question id: 3257

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following statements about evolution is NOT true?

#Question id: 3258

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following incorrect about genetic drift

#Question id: 3259

#Section 3: Genetics, Cellular and Molecular Biology

Different type of evolution leads to group of taxon in following three manners

A- group of taxon whose member have descended from common ancestor

B- when two lineages convergently  evolve similar character states form  groups that are recognized by pheneticists

c. taxon that include most recent ancestor but not all of its descendent

#Question id: 3260

#Section 3: Genetics, Cellular and Molecular Biology

Consider a diploid population at Hardy-Weinberg equilibrium. For a locus with two alleles, the frequency of the A1A1 genotype is 0.04) The frequency of A2 allele is