Final answer:
X-linked agammaglobulinemia, also known as Bruton's agammaglobulinemia, is a genetic disorder that leads to a lack of production of antibodies. This disorder is caused by a defective gene called BTK, which encodes a tyrosine kinase called Bruton tyrosine kinase (Btk). As a result, individuals with X-linked agammaglobulinemia are unable to produce immunoglobulins, leading to a weakened immune response and increased susceptibility to recurrent infections caused by extracellular pathogens.
Step-by-step explanation:
X-linked agammaglobulinemia, also known as Bruton's agammaglobulinemia, is a genetic disorder that leads to a lack of production of antibodies.
This disorder is caused by a defective gene called BTK, which encodes a tyrosine kinase called Bruton tyrosine kinase (Btk).
As a result, individuals with X-linked agammaglobulinemia are unable to produce immunoglobulins, leading to a weakened immune response and increased susceptibility to recurrent infections caused by extracellular pathogens.