Many populations throughout central eurasia share high frequencies of the b allele. what does this pattern suggest about the evolutionary history of these populations?

Many populations throughout central Eurasia share high frequencies of the B allele, this pattern suggest or support the evidence of local adaptation in Eurasian human populations.

a- all cells come from pre-existing cells

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.