Speciation/sympatric

Question 1

What barriers can occur in sympatric speciation

Answer 1

Behavioural, ecological or temporal barriers could arise to reproductively isolated populations.

Question 2

What is sympatric speciation

Answer 2

Sympatric speciation is when 2 populations become reproductively isolated but there is no geographic barrier.

Question 3

What happens when populations become reproductively isolated and try to mate

Answer 3

When populations become reproductively isolated and try to mate, can lead to
Physical incompatibility - species coexist, but can’t mate for physical reasons
Hybrid inviability- offspring is weak and can’t survive long enough to breed
Hybrid sterility offspring is sterile

Question 4

What are ecological and temporal isolation

Answer 4

Ecological isolation is when species occupy different parts of habitat.
Temporal isolation is when species exist in same area, but mate at different times.

Question 4

What is behavioural isolation

Answer 4

Behavioural isolation is when species exist in same area, but don’t respond to courtship behaviour e.g different mating rituals/calls