Asked by Johnny Davis on Jun 08, 2024
Verified
What is the only source of all new alleles?
A) Mutation
B) Gene flow
C) Genetic drift
D) Natural selection
E) Genetic polymorphism
New Alleles
New alleles are variations of genes that arise through mutations, providing a source for genetic diversity within populations.
Mutation
A permanent alteration in the DNA sequence of a gene, which can lead to differences in physical traits or impact health.
- Recognize mutation as the sole source of new alleles in populations.
Verified Answer
ZK
Zybrea KnightJun 08, 2024
Final Answer :
A
Explanation :
Mutation is the only source of all new alleles because it involves changes in the DNA sequence, which can introduce new genetic variations into a population. Other options like gene flow, genetic drift, and natural selection are mechanisms of evolution that act on existing genetic variation, but they do not create new alleles. Genetic polymorphism refers to the existence of two or more variants (alleles) at a particular gene locus in a population's genetic makeup, but it is not a source of new alleles itself.
Learning Objectives
- Recognize mutation as the sole source of new alleles in populations.