In corn (zea mays, purple kernels (r are dominant to yellow kernels (r. cobs from the offspring of a cross between a purple plant and yellow plant were used in a lab. a student counts 329 purple and 299 yellow kernels on one cob.

X² = 1.44

Explanation:

Purple = R, and R is dominant on r

yellow = r,

As given, cross between a purple heterozygous corn plant (Rr) and a recessive yellow corn plant (rr)

yield offspring that display a 1:1 ratio between purple kernels and yellow kernels. Of the total kernels,

it would be expected that 279 would be purple and 279 would be yellow but here results are little differ. The chi-square value is

calculated as: the range of acceptable result should be 1.43-1.44.

Phenotype observed, expected, obs-exp, (obs-exp) 2 (obs-exp) 2/exp

Purple 329 314 15 225 0.72

Yellow 299 314 - 15 225 0.72

X² = 1.44