If an organism's diploid number is 12, its haploid number is

6

Explanation:

To find the haploid number you divide the diploid number in half, and you get the answer for the haploid number. EX: Diploid number: 78. 78 divide by 2 equals 39. Haploid number: 39

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.