A graph of phenotypic variation similar to the
illustration below strongly suggests
a. incomplete dominance.
b. codominance.
c. epistasis.
d. polygenic inheritance.
e. environmental effects on phenotype.
Answer: d
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A scientist fused a mouse cell and a human cell, then treated the cell with specific antibodies
covalently linked to fluorescent dyes (antibodies to mouse proteins--green; antibodies to human proteins--red). What does the cell look like immediately after fusion?
a. The cell is half red and half green. b. The red and green fluorescent labels are uniformly distributed across the entire membrane. c. The red and green labels are distributed in intermingled patches. d. The red and green labels flash intermittently. e. The red and green labels are distributed in a swirling pattern
The anterior pituitary secretes more ACTH, leading to more glucocorticoids in plasma, which causes
the anterior pituitary to then secrete less ACTH. This is an example of what type of hormone control?
a. amplification b. positive feedback c. negative feedback d. cascading feedback e. both amplification and positive feedback
Complement proteins can form a system of proteins that create a pore in the membranes of bacteria. This system is
called the ____________________. Fill in the blank(s) with the appropriate word(s).
Select the option that correctly finishes the following statement: "A cell's genome _________________."
(a) is defined as all the genes being used to make protein. (b) contains all of a cell's DNA. (c) constantly changes, depending upon the cell's environment. (d) is altered during embryonic development.