Gene expression within the body is controlled by the cells, which determine when a specific gene should or should not be expressed. influenza (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?
a.) the gene that controls production of stem cells.
b.) the gene that controls production of skin cells.
c.) the gene that controls production of red blood cells.
d.) the gene that controls production of white blood cells.

The correct answer is D.) The gene that controls production of white blood cells.

It is because white blood cells or leukocytes primarily serve the function of protecting our body against the foreign particle or invader such as bacteria, virus etc.

Therefore, their number will increase many folds in our body during the diseased condition such as influenza in this case. Influenza is caused by influenza virus and is commonly known as flu.

In order to increase the number of white blood cells (such as eosinophil, basophil, monocytes, lymphocytes etc) in our body, the gene controlling their production will express more.

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