If all members of a population have the identical DNA sequence at a given site, that site is said to be _______
A. Monomorphic
B. Polymorphic
C. Trimorphic
A
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Antibodies consist of four polypeptides, ________ heavy chains, and ________ light chains
A) one / three B) two / two C) three / one D) four / four
Retinoic acid ____
a. causes germ cells in male embryos to enter meiosis b. causes germ cells in female embryos to enter meiosis c. prevents germ cells in male embryos from entering meiosis d. prevents germ cells in female embryos from entering meiosis e. affects entry into mitosis but not meiosis
The process illustrated in Figure 13-3 is:
a. DNA synthesis. b. translation. c. transcription. d. a frame shift mutation. e. protein synthesis
Which of the following is a testable hypothesis?
A) Taking zinc lozenges at the first sign of cold symptoms is wise. B) Avoiding contact with other people reduces the chance of catching a cold. C) Being a good driver makes you less likely to catch a cold. D) Sleeping 8 hours a night makes you feel better when you have a cold.