Which of the following best describes the sex chromosomes?
a. They are non-homologous.
b. They are completely homologous.
c. They are heterozygous.
d. They are partially homologous, but also have unique regions.
Answer: d. They are partially homologous, but also have unique regions.
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DNA methylation and histone acetylation are examples of _____
A) genetic mutation B) chromosomal rearrangements C) karyotypes D) epigenetic phenomena E) translocation
The density of the organisms living at great depths is about:
a. the same as the surrounding density. b. greater than the surrounding density. c. less than the surrounding density.
The case of the anorexic student illustrated the role of ________ in the etiology of anoerxia.
(a) stimulus anticipation (b) punishment (c) conditioned-taste aversions (d) the high positive incentive value of food
How will E. coli appear if the mordant is not applied?
A. colorless B. gram-variable C. gram-positive D. gram-negative