Describe an experiment in which transgenic mice were used to identify the male-determining region of the Y chromosome
What will be an ideal response?
When DNA containing only the mouse SRY is injected into normal XX mouse eggs, most of the offspring develop into males.
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The cytoplasmic membrane of bacteria
A. acts as a selectively permeable barrier, allowing some molecules to pass while preventing the movement of others. B. is the major site of ATP synthesis in aerobes. C. retains the cytoplasm and its contents. D. All of the choices are correct.
The human papillomavirus (HPV) carries a gene that functions as an oncogene by inactivating the p53 protein. The fact that the loss of p53 function is oncogenic suggests that
A) p53 normally functions to prevent uncontrolled cell division. B) p53 is a proto-oncogene. C) the HPV protein activates transcription of p53. D) p53 functions at origins of replication in DNA.
Single-stranded complementary tails that are produced by restriction digestion are called ________ ends.
A. 5' B. sticky C. vectors D. orphaned
A particular trait is analyzed using a pedigree diagram. More males than females appear to be affected. This trait is probably:
a. autosomal dominant. b. autosomal recessive. c. sex-linked dominant. d. sex-linked recessive. e. None of the above