The allele responsible for sickle-cell anaemia first appeared in the tropical and subtropical regions of Asia, the Middle
East and Africa. It entered the United States of America when individuals were forcibly brought over from Africa. In micro-
evolutionary terms this is an example of
a
mutation
b
gene flow
c
genetic drift
d
natural selection
Explanation
Correct Option
bNo explanation available
Video Explanation
No video available
Post your Contribution
Share:
Discussions (6)
skete101
2 years ago
Gene flow is the transmission of genes across populations, while genetic drift is the changing of allele frequencies in small groups, which allows alleles to vanish
