Mutations in an intron region of a gene are most likely to _____
a. prevent mRNA from being synthesized
b. trap mRNA inside the nucleus
c. prevent mRNA from being recognized by the ribosome
d. result in no changes in the amino acid sequence
e. alter the amino acid sequence
ANSWER: d
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The male pine cone
(a) produces pollen. (b) contains a female gametophyte. (c) bears a megasporangium containing a megaspore mother cell. (d) gives rise to a seed.
Which sequence-tagged sites can be identified using cDNA libraries?
a. VNTR b. SSLP c. EST d. STR
What vessels transport deoxygenated blood from fetus to placenta?
a. umbilical arteries b. umbilical veins c. ductus venosus d. foramen ovale e. ductus arteriosus
Sex influenced traits are influenced by the presence of ____
a. cortisol b. estrogen c. testosterone d. thyroid hormone e. both estrogen and testosterone