Assuming that a particular disorder is caused by an allele of a single gene, what feature of a pedigree would allow one to conclude that the disorder was caused by a dominant allele?
A. Two unaffected parents have an affected child.
B. Two affected parents have an unaffected child.
C. An affected mother only has affected sons.
D. All of the descendants of a particular affected person are also affected
Answer: B. Two affected parents have an unaffected child.
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The first stage of a specific immune response is the activation of B cells and T cells.
Answer the following statement true (T) or false (F)
The endospore stain reveals internal structures within cells of the genera Bacillus and Clostridium
Indicate whether the statement is true or false
Live weakened polio virus can be used directly in a(n)
A) inactivated whole-agent vaccine. B) attenuated whole-agent vaccine. C) conjugated vaccine. D) subunit vaccine. E) toxoid vaccine.
Which is mismatched?
A) Poison ivy dermatitis - Type 4 hypersensitivity B) Food allergy - Type 1 hypersensitivity C) Serum sickness - Type 3 hypersensitivity D) Hay fever - Type 4 hypersensitivity E) Transfusion reaction - Type 2 hypersensitivity