One reason that diseases caused by dominant alleles remain in populations is that
A) they do not run in families.
B) they often do not produce symptoms until a person has already had children.
C) they affect more females than males.
D) they are more curable than recessive diseases.
B) they often do not produce symptoms until a person has already had children.
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Which of the following is NOT a documented biological result of global warming?
a. Warm-adapted marine species are becoming more common and cold-adapted species less common. b. Plants display earlier flowering and growth. c. Alpine butterflies are shifting their distribution 6.1 meters higher in altitude per decade. d. Animals display earlier migration and breeding. e. Massive animal extinction.
Which gas is increased in the atmosphere and
amplifies the green house effect?
a. carbon dioxide b. nitrous oxide c. phosphates d. bicarbonates e. more than one of these
List the three factors required for gene therapy, and explain the difference between ex vivo and in vivo gene therapy. What will be an ideal response?
Which of the following statements about plant hormones is false?
a. They are organic compounds that act as a highly specific chemical signal. b. They are effective in extremely small amounts. c. They elicit many different responses. d. They stimulate a response at one concentration and inhibit that same response at a different concentration. e. They can be categorized into seven major classes.