A mammalian female's
a. cells usually have multiple Barr bodies.
b. body is a mosaic for the X-linked traits she
inherits.
c. Barr bodies are active in some cells.
d. Barr bodies are produced after puberty.
e. X-linked recessive genes are always
expressed because of the deactivation of an
X chromosome in each cell
B
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The most hydrophobic molecule is
A. C2H5COOH B. C2H6NH2 C. R-NH2 D. C3H7OH E. C5H10O5
Leader sequences contain signals that:a
prevent enzymes from degrading the newly synthesized mRNA. b. inhibit ribosome binding until the appropriate time. c. initiate chain termination. d. allow the ribosomes to be properly positioned to translate the message. e. allow tRNA molecules to successfully bind to mRNA.
Insects have an excretory system consisting of Malphighian tubules
____________________ Indicate whether the statement is true or false.
A behavior that has evolved to aid relatives, although at personal risk, and thus increases the chance of your genes being passed on to the next generation is known as
A. altricial behavior. B. adaptive behavior. C. kin selection. D. operant conditioning. E. instinctive behavior.