Exam 2: Biological and Environmental Foundations

Dominant genes are always expressed, regardless of the gene they are paired with.

Which of the following individuals would be a good candidate for genetic counseling?

For strongly canalized traits, such as walking, only extreme experiences or changes in the environment can prevent the skill from developing.

Our genetic makeup, inherited from our biological parents, consists of a complex blend of hereditary characteristics known as ______.

_____ is the process of cell division during which DNA replicates itself.

Mitosis ultimately enables humans to:

One of the most common recessive disorders is _____, which is diagnosed in about 1 of every 15,000 newborns.

Genetically, monozygotic twins are no more similar to each other than are other siblings that are conceived and born separately.

Down syndrome is also called ______.

Using ______, behavior geneticists deliberately modify the genetic makeup of animals to examine the influence of heredity on attributes and behavior.

______ is recommended for women ages 35 and over, especially if the woman and partner are both known carriers of genetic diseases.

A wide range of potential expressions of a genetic trait, depending on environmental opportunities and constraints, is called ______.

According to the epigenetic framework:

List three examples of dominant traits and three examples of recessive traits.

Most mutations are fatal.

The ____ is the set of instructions to construct a living organism.

Xavier has dark curly hair and facial dimples. These characteristics are called _____ traits.

Prenatal screening can only identify common chromosomal disorders, such as Down syndrome, and present considerable risk to the developing fetus.

When is prenatal screening likely to be recommended?

Kaden is very thin, has severe acne, and demonstrates poor coordination. He also produces excessive levels of testosterone. Kaden has _____ syndrome.