When sperm enter the epididymis, they ________
A) come from the vas deferens B) are mature
C) are ready to fertilize an egg D) are incapable of moving on their own
Answer: D
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Cystic fibrosis is most often caused by the CFTR?F508 mutation. This mutation:
A. reduces the function of a chloride ion channel. B. increases ATP binding to chloride. C. is autosomal dominant. D. causes symptoms in carriers.
Skeletal muscle fibers are composed of ____
a. cells b. nuclei c. myofibrils d. epithelial tissue e. bursa
A sigmoidoscopy is used to screen for ____________________. Fill in the blank(s) with the appropriate word(s)
Morgan's student Sturtevant demonstrated that the recombination frequencies between a series of linked genes is additive. Examine the following recombination data from Sturtevant, and determine the proper order of the genes on the Drosophila X chromosome. Assume y is in the 0.0 position.Gene 1 Gene 2 Recombination frequencyyellow(y) vermilion(y) 0.322vermilion miniature(m) 0.030white(w) vermiliom 0.297yellow white 0.010white miniature 0.337
A. y m v w B. y w m v C. y w v m D. y m w v