Exam 2: Biological Foundations: Heredity, Prenatal Development, and Birth

One key purpose of the amniotic fluid is to

Dr. Fry has just been informed that his son has sickle-cell trait. As a knowledgeable physician, Dr. Fry would realize that his son's body is most likely to experience

_________ occurs when an individual intentionally seeks out an environment that matches characteristics driven by his or her genes.

Which best exemplifies the concept of incomplete dominance?

The developing human organism that has just become completely embedded in the wall of the uterus is called the

The point at which a fetus has a chance to survive if it were to be born is called the age of _____.

Your phenotype includes physical, psychological, and behavioral features.

Muscle and bones develop during the embryonic period from cells contained in the _____ layer.

Cephalocaudal development proceeds from your extremities toward your body.

A newborn weighing less than 1500 grams (3.3 pounds) but at least 1000 grams (2.2 pounds) is classified as _____ birth weight.

Whose mother most likely took thalidomide while pregnant?

Prenatal development begins

Because of his accurate knowledge of genetics and disorders, Benson knows that his newborn son has no chance of having

Hair and skin originally develops in the ectoderm layer of a zygote.

Jen is 20 years old, pregnant, and eats well, but she is under a lot of stress. Her friend Angelina, who is also pregnant, is 42 years old and has a very poor diet, but is under little stress. What prediction could you make concerning the postbirth health of each of these women's babies?

The younger the mother, the greater the risk that she will give birth to an infant with Down syndrome.

The thick, greasy substance that covers the fetus around five to six months after conception is called

Because it involves prolonged physical effort, the process of childbirth is often referred to as involving stages of

Length of gestation (i.e., number of weeks in utero) and weight at birth are both related to birth risk. Demonstrate your awareness of key related concepts by discussing the concepts of prematurity, low birth weight, and extremely low birth weight.

Kirk is heterozygous for cheek dimples but is born with big dimples in both cheeks. Apparently, the allele for cheek dimples is