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Corn Kernels

Decent Essays

The phenotypes for the ear of corn observed, consisted of 192 purple kernels and 66 yellow kernels. When reduced, the actual phenotypic ratio for this monohybrid cross was 32:11 (32 purple and 11 yellow). It matches the predicted phenotypic ratio of 3:1 (3 purple versus 1 yellow). If 3 and 1 were multiplied by three, the predicted phenotypic ratio would be 33:11, resulting in our ear of corn, being off by only 1 purple kernel.

The ear of corn labelled G, had 291 corn kernels total for the 6 rows. There were 168 purple-smooth corn kernels, 54 purple-wrinkled kernels, 49 yellow-smooth kernels, and 20 yellow-wrinkled kernels. The actual phenotypic ratio for this dihybrid cross is 168:54:49:20. No common factor can go into all four numbers, so it cannot be reduced.

The chi-square value for the data from the dihybrid cross was 0.993. The data supports the prediction. We fail to reject the null hypothesis. There is around an 80% chance (p=0.80) that a fair corn would yield the observed results. …show more content…

Our hypothesis was that there would be no difference between the actual phenotypic ratio and predicted phenotypic ratio of the ear of corn labelled G. As each row of corn was being counted and recorded, a trend appeared, revealing that purple-smooth corn kernels were by far the most common, followed by purple-wrinkled and yellow-smooth corn kernels, with yellow-wrinkled corn kernels appearing the least. The corn kernels appeared in this pattern because the corn kernel with two dominant traits (purple being the dominant color, along with smooth being the dominant texture) would take precedence over the recessive yellow color and wrinkled

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