Dear Stephan
>We divided into groups of four and each group used 60 green and yellow
>beads in containers to represent alleles in individuals in a population.
We
>drew the breads out singly at random to simulate genetic drift while
>reducing the population by 5 pairs each generation, i.e. 55, 50, 45
pairs,
>and recorded the gene frequency and phenotypic effect.
Don't understand the experiment. If you removed beads randomly the ratio
of green to yellow should remain constant if enough trials were made.
maybe 120 is to small a starting population.
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