A pregnant woman has an ultrasound to assess the progress of the twins she is expecting. Her doctor says, From what I can see on the screen, Ms. Black, it looks as if you will have a boy and a girl. In what stage of development must the twins be?
a. gamete
b. zygote
c. embryo
d. fetus
Question 2
A pregnant woman regularly uses cocaine and heroin throughout her pregnancy. Chances are that her baby will:
a. Have Down syndrome
b. Have Tay-Sachs disease
c. Be born late and have an exceptionally large head
d. Be born prematurely and show unusual irritability
Acromegaly in one individual from a pair of identical twins.
Cushing’s syndrome. A photograph of a woman with the characteristic facial features of Cushing’s syn
Some scholars regard Walt Whitman as a poet of nature, and others, a poet of the body—a reference to
Effect of an Increase in Technological Progress
identical (left) and fraternal (right) twins
Identical twins (monozygotic twins) have the same sex and share a single genotype.