Multiple choice

European and African genes entered the gene pool of Vietnam during the 1970's and early 1980's mainly as a consequence of

  1. gene flow

  2. migration

  3. natural selection

  4. mutation

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The source of these alien genes was mostly male American soldiers. Since they left Vietnam, they were only visitors. However, by successfully mating with Vietnamese women, they left copies of their genes in south-east Asia.