Gerald is lightheaded and tired from a lack of oxygen in his tissues. what is most likely the reason he feels this way? a. his plasma level is high. b. his white blood cell count is high. c. his platelet count is low. d. his red blood cell count is low.

His red blood cell count is low, so Gerald is feelign lightheaded and tired.

D

Explanation:

Gerald is lightheaded and tired from a lack of oxygen in his tissues. His red blood cell count is low.

(This type of diagnose is called Anemia)

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.