Mendel and the Gene Idea

Campbell Chapter 13

1. Describe the four ideas which have come from Mendel's hypothesis concerning inheritance.

2. Define homozygous, heterozygous, phenotype, and genotype.

3. What is a testcross and how is it useful?

4. Understand how to construct a Punnett square and use it to predict genotypic and phenotypic ratios.

5. Define the rule of multiplication and the rule of addition.

6. Define complete dominance, incomplete dominance, codominance, multiple alleles, pleiotropy, epistasis, and polygenic inheritance.

7. Explain how one allele can be dominant over another at the molecular level.

8. How is a pedigree used in genetics?

9. Distinguish between recessively and dominantly inherited disorders?

10. Although they are used in different ways, carrier recognition, fetal testing and newborn screening are each useful tools. Explain.

11. What is chorionic villus sampling?