Exam 3: Genes, Environment, and Development

An individual who has the ability to transmit a recessive trait to his children but who does not actually express the trait, is called a _____.

During an _____, a needle is inserted through a pregnant woman's abdomen and a sample of fluid containing cells shed by the fetus are extracted.

Sickle-cell disease likely arose as a mutation that was passed along because it protected individuals from

At conception, the genetic material of the mother's ovum and the genetic material of the father's sperm unite, creating a new cell called a(n)

The main point of evolution is that development

Which type of prenatal testing is the LEAST invasive?

Experiences unique to an individual and not experienced by other family members are referred to as

_____ gene-interactions become increasingly important as we age.

Conception is defined as the moment when the

Species heredity is very important to our understanding of individual differences in human growth and development.

What determines the chromosomal sex of a child?

Despite the fact that it is the result of recessive genes, some carriers of sickle-cell disease possess both normal and sickle-shaped blood cells. This phenomenon is best explained by

_____disease appears to have developed as a mutation that helped protect people from malaria.

Olive has very red eyes, while her husband Skye has very blue eyes. Interestingly, their son's eyes are best described as purple. The eye color of their child best exemplifies the concept of

A sex-linked characteristic most likely involves a problem with the _____ chromosome.

Special diets can be used to diminish the likelihood of brain damage in individuals with

_____ syndrome is the most common hereditary cause of mental retardation.

Concordance rates show the likelihood that if one member of a pair has a particular trait, the other member of the pair also has it.

How would you design a study to determine the contributions of genes, shared environment, and nonshared environment on alcoholism?

Maria gives birth to a child with trisomy 21. Which of the following is true?