DNA coding regions that affect the same trait are called
a. homologues.
b. alleles.
c. autosomes.
d. loci.
e. gametes.
B
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In lab you are told to operate on a mouse to disrupt hormonal control of the sympathetic nervous system and body fluid regulation, so you decide to cut the duct leading to the
A. parathyroid gland. B. pancreas. C. adrenal gland. D. pineal gland. E. testis.
_____ allow ions and small molecules to be quickly transferred between cells
1.Tight junctions 2.Gap junctions 3.Adhering junctions 4.Microvilli
The karyotype in the image below is that of a _____
1.normal female
2.male with Down syndrome
3.normal male
4.nonhuman mammal
Spatial summation is characterized by:
a. several presynaptic neurons releasing neurotransmitter simultaneously. b. several presynaptic neurons releasing neurotransmitter in a sequential pattern. c. several postsynaptic neurons receive sequential inputs from several presynaptic neurons. d. a single presynaptic neuron firing multiple times in rapid succession. e. a single presynaptic neuron directly contacting several postsynaptic neurons.