Chapter 20 - Patterns of Inheritance

Question 1

State two reasons why it might be inappropriate to use hardy Weinberg principle to estimate allele frequencies at small numbers

Answer 1

Population may not sufficiently be large
Population may not be randomly mating

Question 2

State one way in which genetic diversity can be measured

Answer 2

Genetic polymorphism

Question 3

Explain why a genetic bottleneck can lead to low genetic diversity

Answer 3

Genetic bottleneck is when there is a larger change in population size and many alleles are lost, therefore currently there are fewer survivors

Question 4

Explain allopatric speciation

Answer 4

Allopatric speciation, different selection pressure, random mutation , beneficial alleles are passed on and this results in directional selection

Question 5

State 3 other conditions that must be present in order for speciation to occur

Answer 5

Time
Genetic Diversity
Natural Selection

Question 6

How can one allele (B) inhibit expression of another allele (A)

Answer 6

Allele B produces repressor protein. The protein then binds to promoter of A. B stops transcription and translation of allele A
Product B inhibits the enzyme encoded by A