One of the laws Mendel established is the law of independent assortment. Assume that a parent has the genotype Aabb and that this parent produces gametes. Which of the following illustrates the letter or letters that could be present in one of these gametes according to the law of independent assortment?
A) AB
B) ab
C) A
D) Aa
Ans: B) ab
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A group of interacting serum proteins that provide a nonspecific defense mechanism is
A. complement. B. interferon. C. glycoprotein. D. lysozyme.
Drugs called selective serotonin reuptake inhibitors (SSRIs) block reuptake of serotonin and are used to treat depression. Which of the following would occur in a patient given a SSRI?
A. Serotonin levels would decrease in the synapse. B. Serotonin levels would increase in the synapse. C. More serotonin would be released by the neuron. D. Less serotonin would be released by the neuron. E. The neuron would switch from serotonin to another neurotransmitter.
Suppose a founding population carries an allelic frequency not typical of the original population. Which of the following effects would most likely lead to homogenization?
A) genetic drift within the founding population B) random mating within the founding population C) no mutations within either population D) migration between the original and founding populations E) None of the above.
In a general sense, ________ refers to short term environmental conditions, and ________ refers to long term environmental conditions
Fill in the blank(s) with correct word