Understanding Inheritance School to Home LESSON 2

Name
Date
School to Home
Class
LESSON 2
Understanding Inheritance
For this activity, you will need the tables below and a pencil. Refer to your textbook as needed.
A farmer who raises vegetables wants to cross two types of corn plants. One type is a
homozygous plant with red kernels (RR) and the other is a homozygous plant with white
kernels (rr). For these plants, red color is dominant and white color is recessive. Fill in the
Punnett square below to predict the offspring the farmer should expect.
1. Using the Punnett square, predict the color of the corn kernels. Will the plants produce
all red kernels, all white kernels, or a mixture of both colors?
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
2. What would be the ratio of red corn to white corn in the offspring?
Next, the farmer cross-pollinates the red hybrid (Rr) offspring. Complete the Punnett
square below for this cross.
3. Using the Punnett square, predict the color of the corn kernels. Will the plants produce
all red kernels, all white kernels, or a mixture of both colors?
4. What would be the ratio of plants with red kernels to plants with white kernels
in the offspring?
Genetics
35