Early failures of gene therapy included two children who developed ____________________ after receiving gene
therapy for X-linked SCID. Fill in the blank(s) with the appropriate word(s).
leukemia
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The size of an action potential depends upon the strength of the stimulus; a strong stimulus will initiate a larger action potential
1.True 2.False
Calico cats are never male because:a
recessive genes are not usually expressed on their X chromosome. b. male hormones prevent expression of the calico phenotype. c. two different X chromosomes are needed for the expression of the calico phenotype. d. two different Y chromosomes are needed for the expression of the calico phenotype. e. one X chromosome and one Y chromosome are needed for the expression of the calico phenotype.
Which of the following pairs is incorrectly matched for cells and the molecules they secrete?
A. Mast cells; histamine B. Natural killer cells; toxic chemicals C. Eosinophils; toxic chemicals D. Neutrophils; heparin E. Basophils; heparin
Undercooked shellfish contaminated with ________ can lead to foodborne illness
A) Toxoplasma gondii B) Campylobacter jejuni C) Listeria monocytogenes D) Yersinia enterocolitica E) Vibrio vulnificus