BSCI 222 Study Guide - Midterm Guide: Y Chromosome, Meiosis, Thomas Hunt Morgan

• School: University of Maryland
• Department: Biological Sciences Program
• Course: BSCI 222
• Professor: Kocher

Document Summary

Sources of genetic variation in meiosis: cross-over. Chi-squared tests (independence and goodness of fit?) Genetic mapping: recombination frequencies and interpretations. Dihybrid and trihybrid crosses: two point and three point crosses. Lynn margulis: first to postulate that eukaryotic cells were a evolutionary union that involved ingestion of prokaryotic cells: endosymbiotic theory. Example: organism with 2n = 16: tetrapolyploid = 4n = 32, trisomy: 2n+1 = 17, tetrasomy: 2n + 2 = 18. Examples of aneuploidy: t(cid:396)iso(cid:373)(cid:455) (cid:1006)(cid:1005): do(cid:449)(cid:374)(cid:859)s (cid:455)(cid:374)d(cid:396)o(cid:373)e. Examples of polyploidy: triploid syndrome in humans, bananas tend to be polyploidy. If you continuously replicate and pass on your genome, each deleterious mutation will be passed on with it. This is a possible reason why sexual reproduction may be preferred over asexual reproduction. I guess, see mulle(cid:396)(cid:859)s at(cid:272)het: sex can = high fitness in individuals with few or no mutations. A normal parent has 2 of each: chr21 and chr14.