Genetics: Sep. 26-30
Genetics: Sep. 26-30 BIOL 3250
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This 1 page Class Notes was uploaded by Anzlee on Thursday September 29, 2016. The Class Notes belongs to BIOL 3250 at Middle Tennessee State University taught by Mohamed Salem in Fall 2016. Since its upload, it has received 9 views. For similar materials see Genetics in Biology at Middle Tennessee State University.
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Date Created: 09/29/16
Genetic Linkage and Mapping in Eukaryotes • Law of independent assortment- not true all the time • Linked assortment- where haploid gametes have multiple genes located on the same chromosome • Crossing over- only way to break linkage o Much rarer than independent assortment o Between two individual chromatids • Genetic maps- used to estimate distance between genes o Higher probability to crossover with larger distance • Each chromosome has a hundred-thousand genes • Each gene has a particular locus, or place, on the gene • Chromosomes are called linkage groups o 24 total chromosomes = 24 linkage groups • Map distance = number of recombinant offspring/total number of offspring * 100 o Recombinant offspring- the amount of offspring that are not like original parents o Units of distance- centiMorgans (cM) or map units (mu) o 1% recombination frequency = 1 map unit