BIOL 1000 Chapter Notes - Chapter 11: Genetic Recombination, Centimorgan, Barr Body
Document Summary
Chapter 11 also refer to (cid:862)biol(cid:1005)(cid:1004)(cid:1004)(cid:1004) (cid:374)otes(cid:863) pdf file. Genes on the same chromosomes may assort dependently because they are on the same physical entity. Genes further away on a chromosome are more likely to be separated (fig 9. 13 chapter 9) Any (cid:272)ha(cid:374)ge i(cid:374) (cid:858)(cid:449)ild t(cid:455)pe(cid:859)/(cid:374)or(cid:373)al ge(cid:374)ot(cid:455)pe is defi(cid:374)ed as a (cid:373)uta(cid:374)t (based on alterend phenotype) Parental offspring inherit chromosomes that were not involved in recombination in the dihybrid parent. Recombination frequency the further the genes, the higher the recombination frequency. Double crossovers decrease the recombination frequency (both genes are crossed over to the other chromatid) Centimorgan show positions of genes with respect to each other (the map units are relative) eg. 10 um away in one gene could mean 5% in one chromosomatid but 50% in another. 11. 1c chromosomes crossing over consist of 4 chromatids, among which 2 chromatids cross over.