A woman who is a carrier for XLA marries a man who does not have the disorder. They have four sons. How many could be expected to have XLA?

Their sons have 50% chance of having XLA.

Explanation:

X-linked agammaglobulinemia (XLA) is a genetic disorder that affects person immune system or ability of the body to fight against Infections. A person with XLA disease have few B cells which are specialized white blood cells for fighting Infections. If a female have XLA disease she has 50% chance of transmitting disease to their sons. A male has 50% chance of having XLA and female 25% chance.

clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.

b

is correct hope this   also i learnd this in middle school