Linkage - Linkage In peas the locus for seed texture(smooth...

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In peas, the locus for seed texture (smooth or wrinkled) and seed color (yellow or green) are on two different chromosomes so they assort independently. Suppose that they are on the same chromosome as indicated in the diagram below. Independent assortment will not occur because the "S" gene is on the same chromosome as the "y" gene. Similarly, the "s" gene is on the same chromosome as the "Y" gene. Unless crossing-over occurs, "S" will always be found with a "y" and "s" will be found if there is a "Y". Mendel studied seven different characteristics in peas. Each of these characteristics are on different chromosomes, so they assort independently. Example: Two Gene Loci Let S = smooth, s = wrinkled Let Y = yellow, y = green P 1 SMOOTH, YELLOW X wrinkled, green genotypes: SSYY ssyy gametes: SY sy F 1 SMOOTH, YELLOW X SMOOTH YELLOW genotypes: SsYy X SsYy Α χροσσ βετϖεεν τϖο ινδιωιδυαλσ τηατ αρε ηετεροζψγουσ φορ τϖο γενε λοχι ισ χαλλεδ α διηψβριδ χροσσ . gametes: SY, Sy, sY, sy
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.

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Linkage - Linkage In peas the locus for seed texture(smooth...

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