If the corn kernel phenotypes that you observed on a dihybrid cob were statistically similar to the corn kernel phenotypes that you expected on a monohybrid cob, then what Mendelian law did your data support?
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Step 1: The data suggests that the inheritance of the two traits being studied (represented by the dihybrid cob) follows the principle of independent assortment. Show more…
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Obtain a "Dihybrid Cross" cob of corn. This cob will represent the F2 generation of dihybrid cross and compare two traits plump/shrunken and purple/yellow. Make a prediction as to the percentages of each and fill in the chart below. Then, count the number of phenotype kernels within one section of the cob containing 100 kernels. Record the phenotypes, within this section only, in the table below. Phenotype | Predicted % | Observed # | % of Total Plump ( Yellow Kernels) Shrunken ( Purple Kernels) Total = 100 | 100% Purple Yellow Total = 100 | 100% Plump / Purple Plump / Yellow Total = 100 | 100% Shrunken / Purple Shrunken / Yellow Total = 100 | 100%
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In maize (corn) plants, a dominant allele $I$ inhibits kernel color, while the recessive allele $i$ permits color when homozygous. At a different locus, the dominant allele $P$ causes purple kernel color, while the homozygous recessive genotype $p p$ causes red kernels. If plants heterozygous at both loci are crossed, what will be the phenotypic ratio of the offspring?
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