natural selection

Question 1

what is natural selction

Answer 1

Natural selection is the process by which individuals that are best suited to their environment pass on their genes.

Question 2

what are the four observations that led to develop the idea of natural selction

Answer 2

1. Members of the same species are often physically different
   2.Offspring look like their parents
   3.There are more offspring (children) than parents
   4.Some offspring do not survive

Question 3

what is natural selection

Answer 3

Natural selection is the process by which individuals that are best suited to their environment pass on their genes.

Question 4

what are the four observations that led to the development of the idea of natural selection

Answer 4

Members of the same species are often physically different
Offspring look like their parents
There are more offspring (children) than parents
Some offspring do not survive

Question 5

what were the two infernces made by Darwin

Answer 5

• In the struggle to survive, the individuals that are most suited (adapted) to their environment will survive.
• The individuals that do survive pass their genetic traits on to their offspring.

Question 6

what are gene pools

Answer 6

The gene pool includes all the alleles for all the genes in that population.
When new mutations arise, alleles are introduced to this gene pool and the gene pool will increase.

(the stock of different genes in an interbreeding population.)

Question 7

what is allele frequency

Answer 7

Populations continuously evolve and this means the frequency of certain alleles in a gene pool will also change.
Allele frequency is how common an allele is in a particular population.

Question 8

what affects allele frequency

Answer 8

This is affected by the environment, with the alleles that enable an individual to survive being more common.