Describe constitutive heterochromatin and facultative heterochromatin
Based upon this information, what would you predict would happen during the embryonic development of an organism if some regions of facultative heterochromatin were changed to constitutive regions?
What will be an ideal response?
Answer: Constitutive heterochromatin exists in a highly condensed form at virtually all times in all cells of an organism. These include regions such as telomeres and the centromere.
Facultative heterochromatin accessibility varies with the activities of the cell. In this manner, regions of DNA can be accessible or inaccessible at various points in time.
During embryonic development, if regions of facultative heterochromatin became constitutive, those regions of DNA would no longer be accessible. As a result, the development of an embryo would be negatively impacted.
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Familial hypercholesterolemia is a genetic disease that affects approximately one in 500 people worldwide. There is more than one genetic cause of the disease. Class I is often described as an autosomal dominant disease. Affected individuals have cholesterol levels >250 as children and often >300 as adults. However, homozygotes have cholesterol levels of >600 as children and can die of heart attacks in their 20s. These individuals entirely lack a functional LDL receptor.
Which of the following would be the best description of the inheritance of this form of hypercholesterolemia? A) Dominant epistatic B) Codominant C) Incompletely dominant D) Complementary E) Recessive epistatic
The smaller unit molecules (monomers) which combine to form proteins and polypeptides are called ____________.
a. amino acids b. fatty acids c. monosaccharides d. nucleotides
Which of the following are antimicrobial proteins? Select All That Apply
What will be an ideal response?
What information can not be obtained from an individual's karyotype?
What will be an ideal response?