How does somatic recombination play a role in the formation of antibody genes?
What will be an ideal response?
Ans: Undifferentiated B lymphocytes have immunoglobulin genes with multiple V gene segments and multiple C gene segments. In order for a specific antibody to be produced, a single V gene segment must be joined with a single C gene segment into an immunoglobulin gene that codes for the specific antibody. The "choosing" and "joining" of the two segments is accomplished by recombination between homologous copies of the undifferentiated gene in the somatic B lymphocytes.
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As part of his or her job, a genetic counselor may do all of the following except
a. analyze family pedigrees. b. advise a couple to have direct testing for altered proteins. c. advise a couple to have DNA testing. d. predict the chances of a couple having a child with a specific trait. e. tell a couple not to have children
Which shape is reflected in an accurate graph of population growth?
a. S-shaped curve b. J-shaped curve c. flat line d. Z-shaped curve
Some pathogens produce toxins which function as (histamines/prostaglandins/pyrogens) to cause fever
What will be an ideal response?
Enveloped viruses may enter their host cells by engulfment within coated vesicles (endocytosis).
Answer the following statement true (T) or false (F)