Speciation

Question 1

What is speciation?

Answer 1

Formation of a new species over a very long period of time?

Question 2

what does a barrier do?

Answer 2

isolates a large interbreeding population, a gene pool gets split into 2.

Question 3

types of barriers

Answer 3

geographical - rivers / mountains
ecological - pH
reproductive/ behavioural

Question 4

what gets added into each sub-population

Answer 4

a different mutation

Question 5

if mutation is beneficial?

Answer 5

individuals will have a selective advantage

Question 6

stage 1

Answer 6

a large population of the SAME species is chosen

Question 7

stage 2

Answer 7

a barrier is added to separate the population

Question 8

stage 3

Answer 8

a better adapted, mutated member of the species is added to each population. Each mutated individual is different.

Question 9

stage 4

Answer 9

over time natural selection occurs

Question 10

stage 5

Answer 10

barriers removed to allow the two species to mingle with each other.

Question 11

stage 6

Answer 11

if they are two different species their offspring will be infertile.