When there are bases that are missing, the altered genetic code is read and interpreted incorrectly.

this is a mutation that cannot be fixed, and is known as a what?

(a.) insertion

(b.) deletion

(c.) substitution

The answer is B deletion because it says that there are bases missing

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.

b is the correct answer