Assume that a man who carries an X-linked gene has children. Assuming normal meiosis and random combination of gametes, the man would pass this gene to ________
A) all of his sons
B) half of his sons
C) all of his children
D) half of his daughters
E) all of his daughters
Answer: E
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A. Hershey and Chase B. Chargaff C. Franklin D. Watson and Crick E. Meselson and Stahl
Which of the following statements about plant tissue culture is false?
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Which of the following represents the order in which the four major groups of plants evolved, from the most ancient to the most recent origin?
A. bryophytes, seedless vascular plants, gymnosperms, angiosperms B. seedless vascular plants, gymnosperms, bryophytes, angiosperms C. angiosperms, gymnosperms, bryophytes, seedless vascular plants D. gymnosperms, bryophytes, seedless vascular plants, angiosperms
Rheumatic fever is an autoimmune complication caused by a ________ infection.
a) Staphylococcus aureus b) Francisella tularensis c) Brucella melitensis d) Streptococcus pyogenes