Answer to Question #247957 in Genetics for hihaho

Question

observe the following offspring proportions: 

tall/inflated: tall/constricted: dwarf/inflated: dwarf/constricted in a 9:3:3:1 ratio. 

Notice from the grid that when considering the tall/dwarf and inflated/constricted trait pairs in isolation, they each inherited in 3:1 ratios as expected with a monohybrid cross. 

Use headers to label each part of your experiment.

Test the hypothesis: cross the dwarf and tall plants and then self-cross the offspring. What precautions in the crosses and in growing the plants? 

Analyze data: You observe the following plant phenotypes in the F2 generation: 2706 tall/inflated, 930 tall/constricted, 888 dwarf/inflated, and 300 dwarf/constricted. Reduce to a ratio and determine if they are consistent with Mendelian laws. Were the results close to expected 9:3:3:1 phenotypic ratio? the results support the prediction? What is observed if far fewer plants were used, given that alleles segregate into gametes? what if windy? 

Answer 1

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