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Genetics Midterm 2 Cheat Sheat

Genetics Midterm 2 Cheat Sheat - Autosomal Recessive Equal...

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Autosomal Recessive o Equal frequency in male and female o Skips generations Autosomal Dominant o Equal frequency in male and female o Must have affected parent o Do not skip generations o If rare, most displaying the trait heterozygous and other unaffected X-Linked Recessive o More frequently in males than females o Skips generations
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o Most affected males born to unaffected mothers o Not passed from father to son X-Linked Dominant o Must have affected parent o Do not skip generations Y-Linked o Only males affected o Passed from father to son o Do not skip generations Chi-squared for linkage o Calculate row and column totals o Number expected = (row total x column total)/grand total o X 2 – sum of (observed – expected) 2 /expected o df = (number of rows – 1) x (number of columns – 1) Recombination frequency = number of recombinant progeny/total progeny x 100% Middle gene is one that is expressed by itself in one and not in other (ex. a+ b+ c & a b c+ answer c)
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