What do you call one version or form of a trait?

polygenic trait is the opposite of this so the answer is a pleiotropy trait. hope this helps . also i am on achallenge to see how many friends i can get on so pls friend me

A) Allele

Explanation:

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

you should wear a lead protective shield when having teeth x-rays

hope i

-lavira : )