heterozygous advantage

Question 1

what is the heterozygous advantage?

Answer 1

Situation where a heterozygous genotype has a higher chance of survival than either homozygous genotype

• type of natural selection
• Having one of these alleles = individuals in malaria prone areas have survival advantage

Question 2

what happens when you are heterozygous? (Dd)

Answer 2

• resistant to whatever disease (malaria or TB)
• higher chance of survival
• pass on both alleles = increase in allele frequency = survival right increases

Question 3

what happens when you are homozygous recessive (dd) to a disease?

Answer 3

• die before reproductive age

Question 4

what happens when you are homozygous dominant (DD)?

Answer 4

• more prone to getting diseases (TB or malaria)

- less likely to reach reproductive age