F13 lecture 2 v2

05 which means there is less than a 1 in 20 chance of

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Unformatted text preview: cross for the plant height locus DD, Dd = tall, dd = short •  say we recovered: •  66 tall plants, 20 short plants in the F2 •  does this fit a Mendelian locus with dominance? •  need a “goodness of fit” sta7s7cal test we are formally tes7ng a hypothesis •  the Mendalian ra7o can be thought of as a “null hypothesis” –  null hypothesis , or H0, can be any hypothesis –  here, H0 is the hypothesis that the trait is being determined by a single Mendelian factor with dominance in a monohybrid cross •  the alterna5ve hypothesis, or H1, is that there is not a Mendelian basis for the phenotypic ra7o that we are measuring...
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