Biology Homework, 1/24/02

NameJ ________________

ClassJ ________________

TeacherJ ________________

Read Section 10-1 in your book pages 264-268, and answer the following questions:

1) What is the difference between homozygous and heterozygous?

2) What is the difference between phenotype and genotype?

3) What is a dihybrid cross? What did Mendel allow the F₁ generation to do in his crosses of the pea plants? Distinguish between a dihybrid cross and a monohybrid cross.

4) Define the law of independent assortment.

5) With the following alleles: T (tall) t (short), perform a monohybrid cross between two heterozygous individuals.

****What was the resulting phenotype of the cross?

****What was the resulting genotype of the cross?

6) Utilizing the following alleles: R (round) r (wrinkled) Y (yellow), y (green) perform a dihybrid cross with the following gametes:

2 heterozygous individuals for both traits: ie. (RrYy X RrYy)

****What was the resulting phenotypes of the F₁ generation?

****What was the resulting genotype of the F₁ generation?

7) What is probability? How does it relate to Mendel’s experiments?

****You will have a quiz next class on Section 10-1 in your book and your past two homework assignments!!!!