An Antennapedia (Antp) mutant in Drosophila has legs in place of antennae. This is caused by __________
A) activation of the Antp gene in the head region instead of in the thorax
B) the product of an abdominal segment gene being expressed in the head
C) a chromosomal error that shifts this Antp gene to the anterior end of the complex
D) the interaction of an inhibitor gene of the bithorax complex with the Antp mutation
E) loss of function of the Antp gene
A
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As mature adults, male squid have a modified tentacle that carries their sperm. Sperm are
produced in testes and transferred to this modified appendage prior to mating. During courtship and mating, the male will insert this tentacle into a structure know as the mantle cavity of a female, where the eggs are waiting. Fertilization occurs within this body cavity. Which of the following is true about this scenario?
a. Internal fertilization occurs. b. External fertilization occurs. c. These animals have an amniotic egg. d. both (a) and (c)
ATP molecules are catalysts that lower the activation energy needed to initiate a reaction.
Answer the following statement true (T) or false (F)
What percent of the total blood volume is plasma?
a. 25 b. 40 c. 55 d. 65 e. about 80
Independent assortment refers to which of the following statements?
A) The pole that any one chromosome moves toward is completely independent of the movement of the other 45 chromosomes in humans. B) The position where crossing over occurs is random. C) The sperm that fertilizes the egg is selected at random. D) A maternal chromosome may move toward either pole while the paternal homologue moves toward the other. E) None of the choices is correct.