Biology 1001A Lecture Notes - Lecture 9: Aneuploidy, Xyy Syndrome, Gene Duplication

• School: Western University
• Department: Biology
• Course: Biology 1001A
• Professor: Beth Mac Dougall- Shackleton

Document Summary

Topic: meiosis (cid:862)do(cid:374)"t t(cid:396)ust you(cid:396) (cid:373)i(cid:374)d, it"s like dog. (cid:863) tom haffie (oct. 2016) I(cid:374) fu(cid:374)gi, (cid:396)e(cid:272)o(cid:373)(cid:271)i(cid:374)atio(cid:374) o(cid:272)(cid:272)u(cid:396)s i(cid:374) the zygote, as the zygote does(cid:374)"t u(cid:374)de(cid:396)go mitosis. The diploid phase of its lifecycle is reduced, so immediately the zygote undergoes meiosis meaning that recombination occurs in the zygote. Since both plants and animals have a multicellular diploid place, the zygote does. Specialized cells in these organisms generate gametes by undergoing meiosis. Recombination during prophase creates new combinations of alleles. In meiosis i, tetrads align independently at metaphase. Ability of chromosomes to line up on plate independently of each other huge component in diversity as it ensures variety in chromosomes. Top (cid:272)h(cid:396)o(cid:373)oso(cid:373)es a(cid:396)e(cid:374)"t (cid:396)e(cid:272)o(cid:373)(cid:271)i(cid:374)ati(cid:448)e, o(cid:374)e is (cid:396)e(cid:272)o(cid:373)(cid:271)atati(cid:448)e a(cid:374)d o(cid:374)e is (cid:374)ot, a(cid:374)d just happened to align themselves with the compative chromosomes on the bottom, but agai(cid:374) it"s just random. Different life cycles produce gametes in different ways. Mammalian females and males undergo recombination at different times in the cycle.