Mary, age 37, is pregnant for the first time, and her doctor has ordered a series of routine screening procedures. mary’s doctor probably will not order:

chorionic villus sampling.
amniocentesis.
sonogram.
afp assay.

Chorionic villus sampling

Explanation:

Based on the above-mentioned scenario, the doctor won’t recommend chorionic villus sampling because it is not a routine test.

Doctors prescribe this pre-birth diagnosis when the chances of miscarriage or birth defects in a baby are higher than the normal.

Chorionic villus testing has some risks of certain complications during pregnancy especially if it is conducted before the 10th week of pregnancy.  

chorionic villus sampling and amniocentesis

Explanation: These screening procedures probably will not be ordered because both are not routine screening. These procedures are only carried out when there is already a chance of having a baby with disorders because there is a family history of such disorders or their first baby was born with this condition.

Sometimes when screening or ultrasound shows an abnormality in the fetus, these procedures are carried out to make it confirm. However they carry a chance of miscarriage because of being invasive in nature and both can be done when mother age is 37.

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

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