Which of the following statements about sister chromatids is TRUE?
A. Sister chromatids are produced during mitosis.
B. Sister chromatids are exact copies of each other and are formed just prior to cell division.
C. Sister chromatids are held together by complementary base pairing of DNA at the centromere.
D. After mitosis, sister chromatids contain the same genes, but they may have different alleles.
E. All of these statements about sister chromatids are TRUE.
Answer: B
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a. bones of the middle ear. b. tympanic membrane. c. oval window. d. round window. e. tectorial membrane.
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