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HDFS Midterm Exam – Questions & Detailed Answers
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HDFS Midterm Exam – Questions & Detailed Answers
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HDFS Midterm Exam – Questions & Detailed AnswersWhich characteristic is transmitted through a specific gene pool?
A. Body structure
B. Brain weight
C. Hair Color
D. Walking upright Right Ans - Hair color
The DNA molecule is shaped like a ______.
A. Sphere
B. Twisted rope ladder
C. Cone
D. Pyramid Right Ans - Twisted rope ladder
There are ____ pairs of chromosomes in the human cell.
A. 20
B. 23
C. 25
D. 28 Right Ans - 23
Which of the following traits are found on one gene?
A. Sociability
B. Intelligence
C. Criminality
D. None of these Right Ans - None of these
Male chromosomes are reflected by which pair listed below?
A. XY
B. YY
C. XX
D. AG Right Ans - XY
The alternative states of a gene on the chromosome strands in a pair are
called___.
A. DNA
B. Anomalies
C. Alleles
D. Genotype Right Ans - Alleles
,The genetic information about a trait is called the _____.
A. Prototype
B. Genotype
C. Phenotype
D. Stereotype Right Ans - Genotype
What is the probability that two heterozygous parents will produce a blue-
eyed child?
A. .10
B. .25
C. .50
D. 0.0 Right Ans - .25
How might genetic counseling influence the gene pool?
A. Deciding not to have children decreases the incidence of a disease over
time.
B. Counseling increase the risk-taking behaviors of couples who carry a
genetic disease .
C. Counseling results in gene transfer therapy.
D. Genetic counseling cannot influence the gene pool. Right Ans - Deciding
not to have children decreases the incidence of a disease over time.
Which of the following uses of genetic technology is LEAST controversial in
today's society?
A. Cloning of mammals
B. Using gene therapy to treat a known disease
C. Gene transfer
D. Genetic fingerprinting Right Ans - Using gene therapy to treat a known
disease
The most common genetic cause of intellectual disability in the United States
is
A. Down syndrome
B. Fetal alcohol syndrome
C. Tay Sachs disease
D. Turner's syndrome Right Ans - Down Syndrome
Sperm can stay alive in the uterus for how long?
A. 1 hour
, B. 24 hours
C. 2 days
D. 24 days Right Ans - 24 hours
Sometimes early in the just stational process a single fertilized egg divide and
separate. Two individuals with exactly the same chromosome or composition
begin to form. This results in
A. Monozygotic twins
B. Fraternal twins
C. Sibling twins
D. Dizygotic twins Right Ans - Monozygotic twins
Sarah is in her first trimester. Which phase best describes her current stage?
A. Quickening
B. Cognitive maturation
C. Effacement
D. Embryotic period Right Ans - Embryotic period
The length of a typical human pregnancy is
A. 11 months
B. Longer than any other mammal
C. 38 weeks from ovulation
D. 4 trimesters Right Ans - 38 weeks from ovulation
What is the name of the organ through which nutrients pass from the mother
to the embryo?
A. Placenta
B. Neural tube
C. Amniotic sac
D. Fallopian tube Right Ans - Placenta
When does the differentiation of the sex organs occur in fetal development?
A. The germinal period
B. The embryonic period
C. The fetal period
D. The third trimester Right Ans - The fetal period
At which age in fetal development would you expect to FIRST hear the fetal
heartbeat?
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