Women who are heterozygous for a defective Bruton's tyrosine kinase (Btk) gene _____
a. are more susceptible to infections caused by extracellular pyogenic bacteria
b. have a 50% chance of having a son with X-linked hyper IgM syndrome
c. mount normal B-cell immune responses despite having lowered levels of serum IgG
d. exhibit X-linked agammaglobulinemia
e. have non-random X inactivation in their B cells.
E
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What will be an ideal response?
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