BIOL 2000 Lecture Notes - Centimorgan, Wild Type, Chromosome

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8 Feb 2013
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155 parental frequency of recombinant products = map distance. The genes curly win and ebony are are 20 map units apart on chromosome 3. 80% parental: + + / + + x e cy / e cy [ plus is wildtype and recessive is small letters] F1 ++/ e cy x ecy/ ecy. Ttg and ttg are the same distance as they code for the same gene, so they are in the same spot on the chromosome. In tomoato r and w are 15 cm apart. Gene r controls fruit (r=red r=orange) and w controls flower color (w=yellow w=white). In test cross progeny, what is the frequency of orange fruit and white plant: 42. 5% If there was no test cross, but an f2 generation. What is the probability of the rrww: self cross rw/rw. Objective 3: use recombination frequency to map three segregating genes. Three point test cross-mapping 3 genes relative to one another: consider 3 arabidopsis genes.

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