Speciation

Question 1

What is speciation?

Answer 1

Getting more than one species arising from one species

Question 2

What type of selection is speciation?

Answer 2

Disruptive

Question 3

When does allopatric speciation arise?

Answer 3

When we have a geographical isolation where there is different environmental conditions

Question 4

What happens when allopatric speciation occurs?

Answer 4

• Different alleles are selected for
• 2 populations no longer able to interbreed and produce

Question 5

Where does sympatric speciation occur?

Answer 5

In the same geographical area

Question 6

What is sympatric speciation caused by?

Answer 6

Reproductive isolation
e.g. change in courtship rituals, mutation causing physical inability to mate, change in gamete chromosome numbers

Question 7

What happens due to reproductive isolation(sympatric)?

Answer 7

• Different alleles selected for
• Change in allele frequency
• No longer able to breed and produce fertile offspring

Question 8

What is there not between different species?

Answer 8

Gene flow - sharing alleles between groups

Question 9

What is genetic drift?

Answer 9

Change in allele frequencies due to a small population not having the same alleles as the larger one - not due to natural selection