In females with incontinentia pigmenti, the mosaic
effect of X inactivation in human females can be
observed in
a. skin color.
b. hair color.
c. distribution of fat cells.
d. distribution of sweat glands.
e. all of these.
Answer: a
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A plant’s response to the relative lengths of light and dark periods in its environment during each 24-hour period is a
phenomenon called ____.
a. gravitropism b. photoperiodism c. thigmotropism d. circadian rhythms e. phototropism
Reverse genetics is a process by which the functions of particular genes are worked out by disabling them. What process is used to knock out a gene or alter its expression?
a. molecular cloning b. genetic mapping c. gene targeting d. linkage analysis
Muscles can carry out their unique motor function because they are the only cells that contain actin and myosin.
Answer the following statement true (T) or false (F)
The ability to stand upright and walk on two legs is termed ________
Fill in the blank(s) with correct word