Biology 1201A Lecture 6: Population Genetics
1 Nov 2016
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Had population with black and brown pigs, and wanted to make true breeding populations of black and brown. Selectively bred only the pigs we wanted. (cid:498)artificial selection(cid:499) selective breeding to ensure that certain traits appear at higher frequencies in successive generations (pg. What did we find out: the black phenotype was controlled by a dominant allele, and the brown was a recessive allele. (b)=black (w)=brown. Can we predict the number of offspring that should be a certain phenotype or. Controlled by 2 alleles at one gene locus. genotype? yes: review of frequencies and probabilities, conclusions from simulation, applying the principle: testing for departures from equilibrium. F(black)= #black pigs/ # of total pigs 21/100= 0. 21: frequency of pens containing red pigs. What if we had: f(bb)= 4/15 f(bw)= 3/15 f(ww)= 8/15 f(bb) 4/15. What happens to allele frequencies overtime? (see slide)
