How is sickle cell anemia an example of a pleiotropy? sickle cell anemia is caused by a pair of genes present on different loci of the same chromosome. sickle cell anemia shows a continuous variation in the population. sickle cell alleles affect various organ systems, such as the circulatory and respiratory systems

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."

answerthe capacity to preform work;