U1 - Evolution

Question 1

what is evolution

Answer 1

the process by which organisms change over many generations as a result of variation in the genome. evolution drives the creation of new species

Question 2

describe natural selection

Answer 2

selection is the non random increase in frequency of DNA sequences that increase survival and the reduction in deleterious sequences

Question 3

state the three types of selection

Answer 3

stabilising, directional, disruptive

Question 4

explain vertical gene transfer

Answer 4

genes are transferred from parent to offspring by sexual or asexual reproduction. sexual reproduction results in offspring that are genetically different from the parents. asexual reproduction results in offspring which is genetically identical to the parents

Question 5

explain horizontal gene transfer

Answer 5

genes are transferred between individuals of the same generation