BIOL10003 Lecture Notes - Lecture 26: Concept Map, Gamete, Genetic Linkage
9 Dec 2018
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Compare these solutions with the concept map below. Note: images side by side go from left to right. Recap: genes on the same chromosome not assorting independently are linked. Loci like sepia and minute are more than 50 map units apart, hence independently assorting. these loci are less than 50 mu apart. They are 17. 5 mu apart, hence 17. 5% recombinance. Only produce 2 types of gametes. drosophila males. used for test cross, due to no recombination. Opposite to cis ab and ab parentals. Ab and ab recombinants looking at 3 loci: problem solving. The question tells us the heterozygous parent"s phenotypes, these are the dominant phenotypes. We can tell straight away that they are linked because if they assorted independently, we would expect to see roughly 100 for all groups. In this case shrunken is the middle locus. The location of the loci are usually not given, we need to figure which locus is in the middle.
