Question

source of new alleles
which of the following is the source of new, novel alleles in a population?
multiple choice
mutation
mosis
crossing - over in meiosis
gene flow

Explanation:

Mutation is the ultimate source of new alleles. It creates genetic variation by changing the DNA sequence. Migration (gene - flow) just moves existing alleles between populations, meiosis and crossing - over reshuffle existing alleles but do not create new ones.

Answer:

mutation