Which of the following structures is found inside the nuclear membrane?
A. endoplasmic reticulum
B. centriole
C. cell membrane
D. nucleolus
D. nucleolus
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The mitochondrial DNA study indicated that there was no genetic input from Neanderthals in modern humans, but the whole-genome study suggests that in fact there was. Which of the following strategies could be employed to resolve this discrepancy?
A. Look at the Y chromosome because that also does not undergo recombination. B. Look at the X chromosome because that also does not undergo recombination. C. Look at genomic DNA only in modern humans that are females. D. Look at genomic DNA only in modern humans that are male.
Which of the following terms is mismatched with its meaning or characteristics?
A. Diploblastic—ectoderm and mesoderm B. Triploblastic—ectoderm, mesoderm, and endoderm C. Parazoa—lacks symmetry; no tissues D. Eumetazoa—definite symmetry; tissues organized E. Chordate—animal with notochord
A mammalian female’s
a. cells usually have multiple Barr bodies. b. body is a mosaic for the X-linked traits she inherits. c. Barr bodies are active in some cells. d. Barr bodies are produced after puberty. e. X-linked recessive genes are always expressed because of the deactivation of an X chromosome in each cell.
What passes through the nuclear pores?
A) RNA B) DNA C) DNA and RNA D) None of these