The allele that causes sickle-cell anemia is the result of . a) an insertion leading to a frameshift mutation that changed all downstream codons b) a single base substitution causing a transversion mutation c) two chromosomal translocations followed by fusions d) a silent mutation, which is why it goes unnoticed until adulthood

Sickle-cell anemoa is caused by a mutation in the gane encoding hemoglobin, causing red blood cells to appear half-moon shaped? I don't know, maybe that. I just tiny

Explanation:

"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."