Exam 2: Heredity and the Environment

Mutations that occur in an individual's genetic code may be passed down to the next generation.

Recessive traits are less common than dominant traits because usually

In about 95% of Down syndrome cases, the extra 21st chromosome exists because

Less than _________ of the base pairs in human DNA provide active instructions.

The procedure used to detect chromosomal and genetic abnormalities in the fetus by removing cells from a layer of the placenta is called

Doctors recommend that pregnant women who are _________ or older should undergo genetic testing to determine if their fetus has an extra 21st chromosome.

________ states that the environment limits the expression of genes.

Which of the following psychological disorders has the highest heritability estimate?

Which of the following heritability estimates indicates the strongest genetic influence?

Niche-picking illustrates which form of the G x E interaction?

How might the Human Genome Project help in the detection and treatment of specific diseases?

Which of the following statements regarding probabilistic epigenesis is FALSE?

When sperm are collected from the father and then injected into the mother's reproductive system, this is called

Research on artificial insemination and in vitro fertilization (Golombok, et al.) has found that mothers who use these techniques tend to be more warm and involved with their children compared to other mothers.

Which of the following procedures is NOT commonly utilized to detect genetic diseases during pregnancy?

________ are the type of twins formed when one zygote divided to make two zygotes.

________ is the observable trait that a child shows.

An allele is an _____________ of a gene.

The range of possible phenotypes that exist for a particular genotype is called

Chromosomes are strands of ________ molecules.