True/False: Mark the following statements as true (T) or false (F). If the statement is false, correct it to make it a true statement. a. Gametes result from two rounds of cell division. b. Meiosis results in diploid cells. c. Homologous chromosomes overlap at points called chiasmata or crossover. d. The DNA replicates prior to the start of meiosis II.

a. Gametes result from two rounds of cell division. True

b. Meiosis results in diploid cells. False

c. Homologous chromosomes overlap at points called chiasmata or crossover. True

d. The DNA replicates prior to the start of meiosis II. False

Explanation:

False statements corrected to make them true:

b. Meiosis results in haploid cells

d. The DNA does not replicates prior to the start of meiosis II.

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation: