2.9 Relationships Between Organisms

Question 0

Hybridisation

Answer 0

Collect dna from 2 species, separate strands, mix, complimentary bases from a hydrogen bond, heat to separate, more heat needed means more bonds to broken and more genetically similar

Question 1

DNA base sequences

Answer 1

To make genetic comparisons, more similar means more related…less time to evolve and mutate

Question 2

Amino acid sequence

Answer 2

More similar amino acids means more closely related

Question 3

Immunological comparisons

Answer 3

B injected with A antigens so makes antibodies. Antibodies respond to corresponding antigens. Precipitate. More precipitate means more closely related

Question 4

Courtship behaviour

Answer 4

Vital for survival(reproduction) because females only produce eggs at certain times

Question 5

Courtship behaviour allows

Answer 5

Recognition, identify fertile mate, pair bonds and synchronised mating

Question 6

Sequence of behaviour

Answer 6

Male acts as stimulus to female, if she responds she is ready to make, her action is stimulus to male and so on