Dominant jeans were mask recessive genes, only displaying the trait of the dominant gene. true or false

True, unless there is a codominace, or an incomplete dominance.

i believe the answer is a or 1

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.