When chromosomes have either duplications or deletions, the chances that the mutation will be harmful are a function of:
A. its sizeâ€"the smaller the duplication or
deletion, the greater the chance of harm.
B. its sizeâ€"the larger the duplication or
deletion, the greater the chance of harm.
C. its locationâ€"if it occurs in a germ-line cell,
it will be more harmful than if it occurs in a
somatic cell.
D. its position on the chromosomeâ€"if it
occurs at the tip of a long arm, it is likely to be
less harmful than if it occurs at the tip of a
short arm.
E. None of the answer options are correct.
B
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Which of the following is true of transposable elements (TEs)?
a. Humans are one of a few organisms that do not contain TE DNA in their genomes. b. All TEs make a copy of themselves that inserts into a new location (copy and paste). c. All TEs are removed from one location before moving to another (cut and paste). d. TEs can be mutagenic. e. The site into which a TE inserts itself is homologous to the TE itself.
Given that an unknown atom's mass number (AMU) is 27, its combination of particles could be
A. 27 electrons, 16 neutrons, 16 protons. B. 27 neutrons, 27 protons, 27 electrons. C. 15 neutrons, 12 electrons, 15 protons. D. 16 electrons, 11 neutrons, 16 protons.
An experimental male birth control method has been developed that inhibits gonadotropin-releasing hormone (GnRH). Does this drug have the ability to prevent sperm production? Justify your answer. Indicate any potential side effects that might be of
concern to a man using this method. What will be an ideal response?
Which of the following is false about toxoplasmosis?
A) It is caused by a protozoan called Toxoplasma gondii. B) Meningitis results in a majority of patients since there are currently no treatment options. C) Tachyzoites can invade tissues like the heart, muscles, eyes, and brain. D) Risk factors include eating raw or undercooked meat such as wild game, pork, and shellfish. E) Cats act as the definitive host, shedding the protozoans in their feces.