Question

gene expression within the body is controlled by the cells, which determine when a specific gene should or should not be expressed. influenza a (the flu) is caused by a virus that attacks the respiratory system. which type of gene is likely to be widely expressed in the body of someone who contracts the influenza virus?
the gene that controls production of stem cells.
the gene that controls production of skin cells.
the gene that controls production of red blood cells.
the gene that controls production of white blood cells.

Explanation:

The immune - system response is crucial when a person contracts influenza. White blood cells play a major role in the immune response. Genes that control white - blood - cell production are likely to be widely expressed as they are involved in fighting off the viral infection. Red blood cells are mainly for oxygen transport, skin cells are for protection and other functions not directly related to the immediate immune response against a virus, and stem cells are undifferentiated cells with a more general role in cell production and renewal, not as directly related to the immediate fight against influenza as white - blood - cell - controlling genes.

Answer:

The gene that controls production of white blood cells.