BIO120H1 Lecture Notes - Lecture 5: Genetic Marker, Chaeta, Wild Type
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BIO120H1 Full Course Notes
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Note: i suggest going along with lecture slides while reading notes. Lecture focuses on the struggle to measure genetic variability, and the forces that create and do away with genetic diversity and population. We have around 20 000 genes (humans), not every gene is variable since we all carry the same pair of alleles at that gene, so there is(cid:374)"t any polymorphism in that gene, its monomorphic (it"s fixed) We understood genes through me(cid:374)del"s laws: he started with genes that were variable, he observed these phenotypic differences then tried to understand how it was inherited. If e(cid:448)er(cid:455)(cid:271)od(cid:455)"s the sa(cid:373)e at a ge(cid:374)e, ho(cid:449) do (cid:449)e k(cid:374)o(cid:449) it e(cid:454)ists: the trick is to figure out how many genes are variable or non-variable in a sample of genes. Q: what processes influence the maintenance of genetic variability in populations: random processing cause loss of variability (random fluctuations to population size)
