Exam 2: The Beginning: From Conception to Birth

Every person starts life as a single cell called an embryo.

The interaction of a heterozygous pair of alleles in such a way that the phenotype reflects one allele more than the other is referred to as a(n):

Labor that is started,speeded,or strengthened with a drug is referred to as:

Babies born slightly under 1,500 grams (3 pounds 5 ounces)are considered _____ birthweight.

Some genes are _____,which means "many forms."

In China,a "one-child" policy cut the birth rate in half.Although the intended goal of reducing poverty was achieved,several unintended consequences were identified.All the following were unintended consequences EXCEPT for:

With respect to prenatal development,teratogens _____ prenatal abnormalities.

After giving birth to her first child,Maria experienced a deep sadness that made caring for her child (and herself)difficult.Her husband noticed and called the family's doctor,who suggested Maria may have _____.

When the effects of genes add up to make the phenotype,they are called dominant-recessive genes.

Almost every cell in the human body has 23 single chromosomes.

Vince and Juan are playing basketball.Vince shoots the ball,and Juan blocks the shot.Vince says,"Wow,I didn't realize how tall you were until you did that!" Vince's comment refers to Juan's:

While Li's wife was pregnant,he experienced weight gain and indigestion.When she gave birth,he felt sharp physical pain as well.He was experiencing:

All living things are composed of cells,which manufacture the _____ needed to sustain life and development.

The _____ is a test often administered to newborns that measures responsiveness and records 46 behaviors,including 20 reflexes.

Juan and Keta recently learned that Keta is pregnant.The couple is very excited about the pregnancy and are eager to know the sex of the fetus.The doctor explains that she will be able to determine the sex by the end of the third month using:

Carly just gave birth to her first child two weeks ago.Thomas,Carly's husband,has noticed that Carly is unable to sleep,talks excessively,and seems extremely concerned that something is wrong with the baby,despite being reassured by the doctor.Carly's behavior may indicate that she is experiencing:

The first two weeks of prenatal development are called the fetal period.

The single cell formed from the union of two gametes,a sperm and an ovum,is called a:

Almost every trait is polygenic,which means it is affected by many genes.

Maria just learned that she is 6 weeks pregnant.She is in the _____ period of prenatal development.