Gene flow, genetic drift, Hardy-Weinberg principle
- Which one of the following factors will not affect the Hardy-Weinberg equilibrium? Answer: 1. Constant gene pool Key idea: Hardy-Weinberg equilibrium means allele frequencies stay constant from generation to generation. Fac... 1
- The factor that leads to Founder effect in a population is : Answer: 4. Genetic drift The founder effect occurs when a small group of individuals starts a new population. Their allele frequencies diffe... 1
- A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population ? Answer: 3. 0.16 (AA); 0.48 (Aa); 0.36 (aa) Key idea: Hardy-Weinberg: p² + 2pq + q² = 1 . p = 0.4 , so q = 1 - 0.4 = 0.6 . AA = p² = 0.16 ; A... 1
- Genetic drift operates in Answer: 4. small isolated population Genetic drift is a random change in allele frequency due to chance. Its effect is strong in small isola... 1
- In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by Answer: 1. 2 pq The Hardy-Weinberg equation is p² + 2pq + q² = 1 . p² and q² are the homozygous genotypes, and 2pq is the frequency of heter... 1