If a man and woman are tested and found to be carriers of the sickle cell what is the probability that they will have a child that has sickle cell anemia

If both parents have SCT, there is a 50% (or 1 in 2) chance that the child also will have SCT if the child inherits the sickle cell gene from one of the parents.

negative

Explanation:

because most the time two positives make a negative

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d