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101
Chapter 9
From Meiosis to Mendel
THEMES AND OBJECTIVES
The following is a list of the main themes covered in this chapter and some study objectives. As
you study, focus on these areas. Understand how the information you study fits into these themes
and how these themes relate to each other. Be sure you master each objective before moving on.
1. Genetics is the study of inheritance.
 Explain early thoughts on how inheritance occurred.
 Differentiate between the fields of transmission and molecular genetics.
2. Genotype and environment determine phenotype.
 Differentiate between genotype and phenotype.
 Explain the role of environment in determining phenotype.
3. Organisms reproduce either asexually or sexually, and some can do both.
 Discuss various methods of asexual and sexual reproduction.
 Explain advantages and disadvantages of each type of reproduction.
 Discuss how sexual reproduction leads to genetic variation.
 Thoroughly discuss the stages and events of meiosis, and compare it to mitosis.
4. Genes are carried on the chromosomes, and are recombined in sexually reproducing
organisms.
 Discuss sex chromosomes and autosomes.
 Explain the results of a cross between two true breeding individuals, including the
genotypes and phenotypes of the F1 and F2 generations.
 Be able to use a Punnett Square to predict outcomes of various crosses.
 Discuss interactions between dominant, recessive, and incompletely dominant alleles.
5. Inheritance is explained by Sutton-Boveri Chromosomal Theory of Inheritance.
 Discuss Mendel's Principle of Segregation and Principle of Independent Assortment.
 Explain the components of the Sutton-Boveri Chromosomal Theory of Inheritance.
 Discuss the contributions of other scientists to the field of genetics. Include Morgan,
McClintock, and Creighton.