Genetic Diversity

Question 1

Genetic diversity

Answer 1

The number of different alleles of genes in a population

Question 2

Genetic diversity is a factor enabling what to occur

Answer 2

Natural selection

Question 3

Natural selection principles

Answer 3

Random mutation can result in new alleles in a gene
Many mutations are harmful.but in some cases it may be a benefit
Something happens and it survives
Therefore it can reproduce
The advantageous allele is inherited by members of the next generation
The new allele then increases in frequency in the population

Question 4

Directional selection

Answer 4

Selection may favour individuals that vary in one direction from the mean of the population

Question 5

Example of directional selection,?

Answer 5

Antibiotic resistance in bacteria
Random mutation in bacteria enabled it to make a new protein. This protein was an enzyme able to break down the antibiotic penicillin before it was able to kill the bacteria

Question 6

Stabilising selection

Answer 6

Selection may favour average individuals

Question 7

Example of stabilising selection

Answer 7

Human birth weights

Question 8

Natural selection results in

Answer 8

Species that are better adapted to their environment 
Anatomical
Physiological 
Behavioural
Adaptations