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just need the answer 21.Characteristics that vary on a…
just need the answer
21.Characteristics that vary on a continuum (rather than present/not present) among people, such as height, skin color, or intelligence, are most likely determined by ______ inheritance.
Group of answer choices
recessive
X-linked
dominant
polygenic
22-Which of the following does NOT allow a doctor to diagnose a fetus as having a genetic disorder?
Group of answer choices
chorionic villus sampling.
amniocentesis.
fetoscopy.
ultrasound.
23-Which of the following is FALSE regarding the “epigenetics” NOVA video you watched in Canvas?
Group of answer choices
Epigenetics is being used to reprogram cancer cells.
Epigenome means “above the genome.”
Genetically identical mice can differ in color and size due to epigenetics.
As identical twins age, their epigenetic differences decrease.
24-Which is TRUE regarding Cesarean sections (C-sections)?
Group of answer choices
The increase in C-sections may be due, in part, to inheritance.
C-sections are less likely than vaginal births for a preterm delivery.
They are only done for breech births.
Since 2018, C-sections are more common than vaginal deliveries.
25-What is the major distinguishing factor that separates the embryonic stage from the fetal stage?
Group of answer choices
The skeletal system is laid down during the fetal stage, otherwise organ systems form during the embryonic stage.
The brain forms late in the fetal stage; all other organ systems form earlier.
the groundwork is laid for all major organ systems during the embryonic stage; the fetal stage consists mainly of rapid growth and finishing.
The major event of the embryonic stage is implantation in the uterus; all development occurs during the fetal stage.
26-Uterine contractions appear to indirectly stimulate the release of ____________ in the newborn infant.
Group of answer choices
cortisol/stress hormones
pain neurotransmitters
growth hormone
surfactant
27-Fetal movement is greater from about 8 to 17 weeks GA and then starts to decrease after this period. Which of the following best explains why there is a decrease in activity?
Group of answer choices
Brain development supports inhibition of behavior
Sleep consolidation
Quickening
Less space in the placenta for movement
28-Which statement about the harm done by teratogens is TRUE?
Group of answer choices
The most serious defects occur in the germinal period.
The negative impact of teratogens is usually reversible, particularly the earlier it occurs in prenatal development.
Passive smoking is rarely harmful to the developing fetus.
The genetic makeup of the mother and the developing organism plays an important role.
29-Which of the following is true regarding individuals with FASD?
Group of answer choices
Alcohol likely interfered with the production and migration of neurons in the primitive neural tube.
FASD is rarely associated with attentional difficulties and mental health problems.
When given enriched diets during the first 2 years of life, FAS babies catch up in physical size.
Mild drinking during pregnancy (<1 drink/day) is not associated with FASD symptoms such as small head size. 30-Which of the following statements about prenatal development are TRUE? Group of answer choices Brain weight doubles from the twentieth week until birth As many as 50 percent of zygotes do not survive the first two weeks. In the second month of pregnancy, the eyes, ears, nose, jaw, and neck form. During the period of the last trimester, the infant moves more than any other time in the prenatal period.
