A karyotype reveals that a woman is carrying a fetus that has 47 chromosomes. The test reveals that the genotype of the fetus is XXY. Which of the following statements is correct?
A) The fetus has Turner syndrome, and most likely a nondisjunction event occurred in the mother during egg formation.
B) The fetus has Down syndrome, and most likely a nondisjunction event occurred in the mother during egg formation.
C) The fetus has Klinefelter syndrome.
D) The fetus has an autosomal disorder.
Answer: C
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Which of the following is found in many tetrapods but not in fish?
A) extensive parental care B) asexual reproduction C) internal fertilization D) viviparity E) production of amniotic eggs
The machine used to "shock" a heart that has stopped beating back to life is called a(n)
a. pacemaker. b. antiarrhythmia generator. c. defibrillator. d. electrocardiogram. e. electrocardiograph.
A Chi-squared test is used when the independent and dependent variables are
A. Continuous and Continuous B. Continuous and Discrete C. Discrete and Discrete D. Discrete and Continuous
What are the characteristics of red light, which is absorbed by chlorophylls?
A. Its photons have the shortest wavelength in the visual spectrum. B. Its photons have the highest energy in the visual spectrum. C. It is not considered a part of the visual spectrum. D. Its photons have the longest wavelength in the visual spectrum.