BIOL 1004 Lecture Notes - Lecture 3: Lactase Persistence, Sugar Glider, Ellesmere Island
15 Feb 2017
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Homologies: same organ in different animals under every variety of form and function. It could be due to they same from the same ancestors. Antibiotic resistance as caused by evolution and it already existed. Something that evolved comes from something that already exist in the nature. A lot of a(cid:374)ti(cid:271)ioti(cid:272)s are deri(cid:448)ed fro(cid:373) (cid:271)a(cid:272)teria"s like fu(cid:374)gi, that"s (cid:449)hy hu(cid:373)a(cid:374)s de(cid:448)elops a resista(cid:374)(cid:272)e to it. Convergent evolution: evolution of similar features in independent evolutionary lineages. Similarities are due to convergent evolution, like flying squirrel and sugar glider. Convergent evolution is an example of how it will cultivate to difference situations, like lactose in tolerance. Lactase persistence evolves at the same time the cultural practice of milking livestock was adopted. People in europe, has a mutation of t-13920; kenya for g-13915; sudan for g-13907. The switch increased the positi(cid:448)ity of the i(cid:374)di(cid:448)idual"s a(cid:271)ility to (cid:271)reak do(cid:449)(cid:374) la(cid:272)tose. This mutation has the same effects; they can digest lactase.
