Describe how an aminocentesis is done and the circumstances under which it would be recommended.(visiual pleas

Question

q2)what is the advantage of samplingcells from chorion?

q3)explain how the role the humangenome is maped?

please my exam is 2morrow n even my tummy hurts!please help

Answer 1

I'll answer the first question. An amniocentesis samples the fluid within the amnion surrounding the fetus to retrieve sloughed off cells, which can be analyzed for genetic abnormalities. It involves several steps:

1. Removal of about 20ml of amniotic fluid containing suspended cells that were sloughed off from the fetus

2. Centrifugation; a few biochemical analyses with some of the amniotic fluid

3. Fetal cells; quick determination of fetal s*x and analysis of purified DNA

4. Growth for weeks in culture medium; biochemical analyses for the presence of genes that cause many different metabolic disorders