Except for the sperm and the egg, all cells in the human body have ______ pairs of chromosomes.
Pat’s 23rd chromosome pair contains an X chromosome and a Y chromosome. This indicates that Pat:
b. is male
Women have a ________ chromosome pairing, and men have a ________ chromosome pairing.
a. XX; XY
River has a round face, a flattened skull, an extra fold of skin over her eyelids, a protruding tongue, short limbs, and retardation of motor and mental abilities. She is likely to have been born with:
c. Down Syndrome
This is a prenatal medical procedure where a sample of amniotic fluid is withdrawn by syringe and tested for chromosome or metabolic disorders.
A group of tissues in which small blood vessels from the mother and offspring intertwine but do not connect is the:
Many of the most important developments occur within the first ________ weeks after conception, often before the woman knows that she is pregnant.
The earliest point at which a fetus can have a chance to survive outside the womb is at the beginning of:
c. the third trimester
A teratogen is any agent that can cause:
b. birth defects
Which of the following disorders is LEAST likely to happen to a mother 16 to 34 years old?
b. Down Syndrome
Malorie was born in her mother’s 32nd week of pregnancy. Malorie would be termed a ________ baby.
Juan-Carlos was born full term but was underweight for his gestational age. He would be considered: