HDFS: Chapter 2 Summative Quiz – Flashcards

Unlock all answers in this set

Unlock answers
question
Moderate use of the following substance has NOT been associated with fetal abnormalities:
answer
caffeine.
question
Some men are color-blind because they inherit a particular recessive gene from their mother. That recessive gene is carried on:
answer
the X chromosome.
question
Almost every trait is affected by multiple genes. In other words, traits are:
answer
polygenic.
question
Which factor is associated with neural-tube defects?
answer
folic acid deficiency
question
Chromosomal abnormalities occur when the zygote's cells have:
answer
more or fewer than 46 chromosomes.
question
Which of the following prenatal tests uses high-frequency sound waves?
answer
sonogram
question
Low birthweight (LBW) is defined as a body weight less than ____ at birth.
answer
five and one-half pounds
question
How many trimesters are there in a normal pregnancy?
answer
3
question
Lithium use during pregnancy:
answer
can cause heart abnormalities.
question
The scientific term for an ova and/or sperm is:
answer
gamete.
question
The neural tube eventually develops into:
answer
the spinal cord.
question
The use of heroin during pregnancy:
answer
may cause premature labor.
question
What is anoxia?
answer
lack of oxygen during birth
question
An infant born at 34 weeks would be classified as:
answer
a preterm baby.
question
The embryo has all the basic organs and body parts (except sex organs) at approximately how many weeks after conception?
answer
eight weeks
question
During prenatal development, the time of greatest susceptibility to teratogens is the:
answer
critical period.
question
What chromosomal contribution results in a MALE zygote?
answer
The father contributes a Y chromosome.
question
Which term describes feelings of inadequacy and sadness following the birth of a baby?
answer
postpartum depression
question
The typical human cell contains how many chromosomes?
answer
46
question
In the United States and Canada, folic acid is now added to many foods. The rate of __________ has decreased.
answer
spina bifida
question
What percentage of embryos are aborted spontaneously?
answer
20
question
The stage of prenatal development that lasts from the third through the eighth week is the:
answer
embryonic
question
According to the text, the use of caffeine during pregnancy:
answer
is not a problem so long as it is used in moderation.
question
_____ genes influence the phenotype.
answer
Additive
question
Down syndrome is a condition in which an individual has three copies of:
answer
chromosome 21.
question
_____ refers to traits that are affected by many genes, and _____ refers to traits that are influenced by many factors.
answer
Polygenic; multifactorial
question
A genome is:
answer
a full set of instructions to make a living organism.
question
Chromosomes are molecules of:
answer
deoxyribonucleic acid (DNA)
question
Certain teratogens are relatively harmless in small doses but become harmful once exposure reaches a certain level. This is called:
answer
the threshold effect.
question
Agents and conditions that harm the prenatal brain and impair learning and behavior are called:
answer
behavioral teratogens
question
Each molecule of DNA is called a(n):
answer
chromosome
question
A doula is a woman who:
answer
helps with the birth process.
question
The stage of prenatal development that lasts from the ninth week after conception until birth is:
answer
fetal
question
The full set of genes for a living organism is called a:
answer
genome
question
The organ that develops within the pregnant woman's uterus to protect and nourish the developing prenatal organism is called the:
answer
placenta
question
A person with three copies of chromosome 21 has:
answer
Down syndrome.
question
Which of the following syndromes may be characterized by tics and outbursts of obscenities?
answer
Tourette syndrome
question
Which of the following happens during the germinal period?
answer
implantation
question
The correct sequence of prenatal development is:
answer
germinal period, embryonic period, and fetal period.
question
A person's genetic inherited potential is called the _______, while a person's actual appearance and behavior is called the ________.
answer
genotype; phenotype
question
Tetracycline use during pregnancy:
answer
can harm the baby's teeth.
question
A person with a recessive gene in his or her genotype that is not expressed in the phenotype is called:
answer
a carrier.
question
The primary reason that adolescent mothers often have small babies is:
answer
maternal malnutrition.
Get an explanation on any task
Get unstuck with the help of our AI assistant in seconds
New