In iron deficiency, you would expect which of the following to occur? A increased synthesis of globin chains B. increased synthesis of ferritin C. decreased synthesis of transferrin receptors D. decreased ALAS activity​

Without enough iron, your body can't produce enough of a substance in red blood cells that enables them to carry oxygen (hemoglobin). As a result, iron deficiency anemia may leave you tired and short of breath.

the answer is a or when it says crossing over

this would be a math