Thompson Test Bank with Questions and Answers
Chromosomes consist of - correct answers-long strands of tightly coiled DNA.
The genetic information in male offspring is: - correct answers-inherited from
both the father and the mother.
Female offspring result when: - correct answers-a sperm with an X chromosome
fertilizes the egg.
An alternative form of a gene is called: - correct answers-an allele.
Which of the following statements about alleles is correct? - correct answers-An
individual may have two alleles that are the same or two alleles that are
different.
Which of the following statements about sex-linked inheritance is correct? -
correct answers-Almost all of the sex-linked traits are carried on the X
chromosome and are recessive.
Most common chromosomal abnormalities result when: - correct answers-
homologous chromosomes fail to separate during
meiosis.
The fertilized egg is at which stage when it implants in the uterus? - correct
answers-Blastocyst
,How long can sperm remain viable within the female reproductive tract? - correct
answers-As long as 6 days
What is the significance of the embryotic disc? - correct answers-It gives rise to
the three germ layers.
Which is a function of the yolk sac? - correct answers-Supply the fetus with
nutrients
During the first 2 months of pregnancy, what is the source of estrogen and
progesterone? - correct answers-Corpus luteum
During which stage of pregnancy is the developing fetus most vulnerable to
toxins, stress, drugs, and nutritional deficiencies? - correct answers-First
trimester
What is the function of the foramen ovale? - correct answers-Divert blood from
the right to the left atrium
Fertilization normally occurs in the: - correct answers-fallopian tube.
At which point is the product of conception called a fetus? - correct answers-
After the organs are formed
Which hormone is responsible for the production of milk in the mammary
glands? - correct answers-Prolactin
,What characteristic of umbilical cord blood makes it useful in treating certain
diseases? - correct answers-It contains an abundance of stem cells.
The first hormone secreted at the onset of puberty in both males and females is:
- correct answers-gonadotropin-releasing hormone.
Gametes are: - correct answers-sex cells.
Until ejaculation, sperm are stored in the: - correct answers-epididymis.
Where is testosterone produced? - correct answers-Interstitial cells of the testes
Which organ supplies most of the fluid volume of semen? - correct answers-
Seminal vesicles
The surge in which hormone causes ovulation? - correct answers-Luteinizing
hormone
An embryo attaches to which layer of the uterine wall? - correct answers-
Endometrium
Falling levels of which two hormones trigger menstruation? - correct answers-
Estrogen and progesterone
The structure that secretes progesterone during the last half of the ovarian cycle
is the: - correct answers-corpus luteum.
, Birth control pills prevent pregnancy by: - correct answers-interfering with
follicular development and
ovulation.
Which statement about basal metabolic (BMR) rate is accurate? - correct
answers-A person's size affects his BMR.
Which hormone stimulates the appetite? - correct answers-Ghrelin
In the body, what stores the greatest amount of energy in the smallest amount of
space? - correct answers-Fat
Nonessential amino acids are: - correct answers-synthesized by the body.
Which of the following is a digestible polysaccharide? - correct answers-Starch
An incomplete protein is one that: - correct answers-lacks one or more essential
amino acids.
The major nitrogenous waste resulting from protein metabolism is: - correct
answers-urea
Which statement about water-soluble vitamins is true? - correct answers-They
are excreted by the kidney through urine and must be replaced daily.