GENETIC DIVERSITY & NATURAL SELECTION:

Question 1

What is genetic diversity?

Answer 1

= number of different alleles, of genes in a population

Question 2

What is natural selection?

Answer 2

= can only occur, if there is a genetic diveristy within a population

Question 3

What is natural selection itself?

Answer 3

= leads to evolution in populations

= results to species becoming better adapted for environment
= adapations may be anatomincal, physcological or behaviorial

Question 4

How does natural selection happen?

Answer 4

= selection pressures within environment may change
1: new alleles for a gene are created by random gene mutations
2: if the new allele increases the chances of survival in that environment they they are more likley to survive and reproduce
3:the reprodution [asses onto the adventageous allele to the next generation
4: as a result over many generations the new allele increases in frequency in the population

Question 5

What are the 2 types of selection?

Answer 5

= directional selection

Question 6

What is direct selection?

Answer 6

= one of the extremes traits has the selective advantage
= occurs when there is a change in environment
= the modal trait chanes
=

Question 7

What is stabalising selection?

Answer 7

= modal traits have the selective advanatge
= occurs when there is no change in environment
= modal trait remains the same
= standard debviation as inviduals as individuals with the extremes dereaes

Question 8

What is evolution?

Answer 8

= evolution is change in allele frequency over many generations in a population

Question 9

What does anatomical changes mean?

Answer 9

= anatomy

Question 10

What is physological?

Answer 10

= related to normal function of body systems

Question 11

What is behavioural?

Answer 11

= the organisms behaviour in an environment