Chorionic villus cells are genetically identical to the . are biochemicals whose levels in the blood are within a certain range in a pregnant woman carrying a fetus with the normal number of chromosomes.

1. The right answer is the fetus

Chorionic villi are another type of villi. They are part of the trophoblast, then of the placenta and allow the feeding of the fetus, and exchanges between the latter and the mother.

2. The right answer is maternal serum markers

Maternal serum markers are substances present in pregnant women that help to detect newborn chromosomal abnormalities such as down syndromes.

Current screening (see the legal framework for this screening) is based on the determination of substances present in the pregnant woman's blood, maternal serum markers, as well as the measurement of nuchal translucency.

Answer;

-Cells of the fetus or embryo.

-Maternal serum markers.

Chorionic villus cells are genetically identical to the cells of the fetus or the embryo.

-Maternal serum markers are biochemicals whose levels in the blood are within a certain range in a pregnant woman carrying a fetus with the normal number of chromosomes, but may lie outside that range in fetuses whose cells have an extra copy of a certain chromosome.

Chorionic villus cells descend from the fertilized ovum, their chromosomes should be identical to those of the embryo and fetus.

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