Mitosis and meiosis are similar in that ________
a. enzymes that repair DNA damage are critical to both processes
b. each forms a bipolar spindle
c. each sorts duplicated chromosomes into daughter cells
d. all of the choices
d
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Which of the following types of physical mutagens produces thymine dimer mutations?
A. ultraviolet light B. X-rays C. microwave D. gamma rays E. ionizing radiation
To see the structure of DNA, what type of
microscope would you use?
a. fluorescence microscope b. phase contrast microscope c. compound microscope d. dissecting microscope e. electron microscope
The duplicated chromosome is composed of two sister chromatids held together at a
What will be an ideal response?
By transferring neural crest cells from a duck to a quail and vice versa, Schneider and Helms demonstrated that:
a. neural crest cells influence the development of beaks. b. beaks influence fitness traits. c. homeobox genes are conserved across species. d. gene duplication causes a difference in beak shape.