4.4

Question 1

Genetic diversity

Answer 1

No of different alleles of gene in population

Question 2

Alleles

Answer 2

Variation of particular gene on same locus different dna base seq
Arise by mutation

Question 3

Population

Answer 3

Group of interbreed individuals of same species

Question 4

Importance of genetic diversity

Answer 4

Giving possessor a selective advantage (increased chances of survival and reproductive success) natural selection to occur
Asin certain envi new alleles benefit possessor
By resulting in change in polypeptide coded for that positively changes its properties
Giving possessor selective advantage increased chance of survival and reproductive success

Question 5

evolution

Answer 5

change in allele frequency over many generations in a population
occurs through process of natural selection

Question 6

principles pf natural selection in the evolution of populations

Answer 6

random gene mutations can result in new alleles of a gene
in certain environments the new allele may benefit the possessor as organism as a selective advantage
so possessors more likely to survive and reproduce success
advantageous allele inherited by members of the next generation
over many generations allele increases in frequency in the population

Question 7

anatomical

Answer 7

structural and physical features increasing chance of survival

Question 8

physiological

Answer 8

chemical reactions increasing changes of survival

Question 9

behavioural

Answer 9

ways an organism acts to increase their chance of survival

Question 10

directional selection

Answer 10

eg antibiotic resistance in bacteria
organisms with extreme variation of a trait so an increased number of organisms with allele for extreme trait

Question 11

stabilising selection

Answer 11

human birth weight
organism with average trait has selective advantage so an increased frequency of organism with average traits