evolution

Question 1

4 proceses for evolutionary change

Answer 1

1-genetic drift
2-mutation
3-genetic flow (migration)
4- natural selection

Question 2

3 sources for genetic variation

Answer 2

1-reproduction (genetic shuffling-crossing over)
2-mutations
3-gene flow

Question 3

what can be the results of a mutation

Answer 3

neutral
harmful
beneficial

Question 4

what can acause a mutation

Answer 4

1-Dna fails to copy sccurately
2-external influences
like chemicals and radiation

Question 5

whats gene flow

Answer 5

the movement of genes from one population to the next

Question 6

what is genetic drift

Answer 6

an event randomly kills off some of the population and changes the allelic frquency

Question 7

what is natural selection

Answer 7

where on organism is better adapted to their environment and suvive to pass dfown their genes

Question 8

in “survival of the fittest” what does fitness mean

Answer 8

ability of a genotype to leave offspring in the next generation

• ability to survive
• ability to find a mate
• ability to reproduce