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Flashcards in Chapter 16 Deck (15):
1

Define a species

Population of breeding organisms that must be able to breed twice

2

Speciation can occur when two mechanisms are met.these mechanisms are what

Isolation and divergence

3

What is an excepted category of speciation: sympatric or parapatric

Sympatric

4

What is the difference between a pre-and post zygotic isolating mechanism

Pre-zygotic is before the egg is fertilized while post zygotic is after the egg is fertilized

5

What is an example of a post mating isolating mechanism

Hybrid sterility

6

Went to gene pools are isolated for time and then reunited, how do you tell if they are still the same species?

If they can breed and their offspring can

7

And an ecological isolation the two groups of organisms can be within sight of each other. True or false?

True

8

If a new species is formed within the initial gene pool, it is which category of speciation?

Sympatric

9

Extinction is usually caused by what?

Destruction of habitat

10

Define hybrids

If population cannot breed and has offspring that cannot breed

11

What is alopatric speciation

If isolated, different species. If they can breed, same species.

12

Define sympatric speciation

Mutation takes place, so there are two separate species. A gene pool within the gene pool

13

What is parapatric speciation

A type of aloepatric speciation

14

What are the pre-zygotic isolating mechanisms

Habitat, Temporal, behavioral, mechanical, gamete

15

What are the post psychotic isolation mechanisms

Zygote mortality, hybrid sterility, F2 fitness