Do you believe Corn #1 is the result of a cross between Pp and Pp? Why or why not? What is a dihybrid? What phenotype would a Ppss kernel have?

Genetics of Corn Lab

Instructions: Answer the questions below, based on Experiments 1 – 2.

Experiment 1 – A Monohybrid Cross

Count the kernels in 5 rows of corn kernels for Corn Cob #2 and complete the following table:

Number of Kernels Observed Number of Kernels Expected
Purple Smooth
Purple Wrinkled
Yellow Smooth
Yellow Wrinkled

Total number of kernels observed:

To calculate the number of kernels expected, multiply the total number of kernels observed by the percentage of kernels you predicted would have each phenotype as in Experiment 1.

Genetics of Corn Lab

Instructions: Answer the questions below, based on Experiments 1 – 2.

Describe Mendel’s First Law.

Describe Mendel’s Second Law.

Why is corn a useful model genetic system?

What is a monohybrid?

In Experiment 1, what percentage of the kernels you observed were purple?

Do you believe Corn #1 is the result of a cross between Pp and Pp? Why or why not?

What is a dihybrid?

What phenotype would a Ppss kernel have?