The probability of producing a normal child by two
parents who are carriers for an autosomal recessive
disorder is
a. 0%.
b. 25%.
c. 50%.
d. 75%.
e. 100%.
Answer: d
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Auxin has an effect on plant embryos much like the Bicoid protein in Drosophila. If auxin were added to a culture of embryonic root cells, what would be the likely result?
A) Root cells would elongate and mature. B) Root cells would change into meristem cells. C) Root cells would halt their development. D) Root cells would not respond to auxin.
In the early twentieth century, ____ discovered that genes are carried on chromosomes
a. Thomas Hunt Morgan b. Francis Crick c. Gregor Mendel d. James Watson e. Thomas Huxley
In _________ tests, antibody cross-links whole-cell antigens, forming complexes that settle out and form visible clumps in the test chamber.
Fill in the blank(s) with the appropriate word(s).
Cellular slime molds can be distinguished from plasmodial slime molds on the basis of ____.
A. reproductive structures B. spore formation C. number of nuclei per cell D. slime trails E. food requirements