Question

Several biology students are counting kernels in an ear of corn. They count a

total of 420 kernels: 242 purple wrinkled, 84 purple smooth, 70 yellow wrinkled, and 24 yellow smooth.

What is the best ratio of kernel phenotype in this case?

Answer 1

Easy its 9:3:3:1 PLS LIKE

Step-by-step explanation:

Answer 2

9:3:3:1

Step-by-step explanation:

There are 420 kernels, over half of these are purple wrinkled (242/420=0.576) one fifth are purple smooth (84/420=0.2), just under one fifth are yellow wrinkled (70/420=0.167), and just over one twentieth are yellow smooth (24/420 = 0.057).

The ratio is 0.567: 0.2: 0.167: 0.057

0.567/0.057 = 9.9, so the ratio of purple wrinkled to yellow smooth is around 9:1.

0.567/0.2 = 2.835 and 0.567/0.167 = 3.39, so the ratio of purple wrinkled to purple smooth and yellow wrinkled is approx 3:1

0.2/0.057 = 3.5 and 0.167/0.057 = 2.92, so the ratio of purple smooth and yellow wrinkled to yellow smooth is approx 3:1

Therefore, the ratio is approximately 9:3:3:1.

This is a classic Mendelian ratio for a independent assortment associated with a dihybrid cross.