Genetics lab chi squared worksheets and report() esign Layout References Mailing

Question

Genetics lab chi squared worksheets and report() esign Layout References Mailings Review View Help Tell me what you want to do 1 1Normalm x, A. . A- te. :a-.... , No Spac..-Heading i Heading2 Title -- Subt Font Paragraph Styles What percent are yellow? 25% 2 Suppose now we cross two corn plants: each parent plant is 100% purple kernels, and while we suspect that both are heterozygous for yellow, we don't know for sure. We do the cross, grow the corn, and count kernels. We count 200 kernels in all and have 60 yellow and 140 purple. Is this reasonably close to what we should expect to get from crossing plants that are (Aa) and (Aa) ? If this cross is (Aa) X (Aa), how many (out of 200 offspring) do you expectto be purple? f this cross is (Aa) X (Aa), how many (out of 200 offspring) do you expect to be yellow? In the actual cross, how many did you observe to be purple? How many did you observe to be yellow?

Explanation / Answer

Ans. Yes, its reasonable close to what we get after crossing Aa and Aa.  

Parents-Aa X Aa

F1- AA (homozygous purple,25% of200), 2Aa (50% of 200) and aa(homozygous yellow, 25% of 200)

F1-50+100 purple=150 purple(Expected)

F1-aa(25% of 200)

F1- 50 yellow kernels(Expected)

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