Genetics


Chapter Objectives

At the end of this unit students will be able to
1. Describe the contributions of Gregor Mendel to the study of heredity and genetics.
2. List the characteristics of the garden pea that make it a good subject for genetic study.
3. Define and use correctly the terms homozygous, heterozygous, genotype, phenotype, dominant, recessive, incomplete dominance.
4. Explain the Law of Segregation and the Law of Independent Assortment.
5. Predict the results of monohybrid and dihybrid crosses using Punnet squares and probabilities.
6. Analyze a simple pedigree.
7. Differentiate between autosomal and sex-linked traits.
8. Identify five factors that influence patterns of heredity.
9. Describe the role of mutation in genetic disorders.
10. List two genetic disorders and describe their causes and symptoms.

Chapter Terms

Origins of Genetics Mendel's Theory
heredity
genetics
monohybrid cross
pure-breeding
P generation
F1 generation
F2 generation

allele
dominant
recessive
homozygous
heterozygous
genotype
phenotype
law of segregation
law of independent assortment
Studying Heredity Complex Patterns
Punnett square
test cross
probability
pedigree
sex-linked trait

polygenic trait
incomplete dominance
multiple alleles
codominance

Animated Graphics Courtesy of

Jo's World