Discussion
Which one of the following processes causes the 'Founder effect' in a population?
Answer: A
The founder effect is caused by genetic drift.
When a small group leaves a large population to found a new one, its allele frequencies are a chance sample of the parent population's and can differ markedly from them. That random sampling error is genetic drift, and the founder effect is one form of it, as are population bottlenecks. The high frequency of certain inherited disorders in isolated communities is the classic example.
Mutation creates new alleles rather than resampling existing ones. Natural selection changes frequencies non-randomly, according to fitness. Recombination reshuffles alleles into new combinations within individuals but does not by itself change allele frequencies in the population.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development