The neutral theory of molecular variation posits that:
a. most mutations are neutral.
b. most substitutions are neutral.
c. most mutations are deleterious.
d. B and C.
e. All of the above.
B
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Diagnosis of the leishmaniasis is based on finding the parasite within infected ________.
A. eosinophils B. lymphocytes C. macrophages D. mast cells
Which cell components are found in BOTH plant and animal cells?
a. nucleus, Golgi body, and chloroplasts b. Golgi bodies, mitochondria, and endoplasmic reticula c. vacuoles, cell wall, and mitochondria d. vacuoles, cell wall, nucleus, and lysosomes e. starch grains, chloroplasts, and lysosomes
If anaerobic pathways follow glycolysis,
a. CO2 will be one of the products as pyruvate is converted to lactate. b. the two NADH molecules produced during glycolysis will (depending on the organism) be used to reduce pyruvate to either lactate or ethanol and CO2. c. ATP will be required to convert pyruvate to either lactate or ethanol and CO2. d. oxidative phosphorylation occurs either on the plasma membrane or on derivatives of the plasma membrane. e. none of these will occur.
James is a 42-year-old man with hemophilia, a sex-linked recessive condition. His daughter, Susan, who has normal blood clotting, is married to Fred who also has hemophilia. Susan and Fred are expecting their first child and an ultrasound shows that the fetus is male. What is the approximate probability that their new son will have hemophilia?
A. 1/4 B. 1/2 C. 1 (100%) D. 3/4 E. 2/3