An embryo produced by in vitro fertilization (IVF) may be tested for genetic disorders prior to implantation. How is this accomplished?
A) Fetal cells are recovered from the mother's blood, and the DNA is analyzed.
B) Amniocentesis or chorionic villus sampling is performed, and a karyotype assembled.
C) A polar body is isolated and its DNA amplified by PCR for analysis.
D) A single cell is removed from a 6- to 8-celled embryo, and its DNA analyzed.
E) Blood is drawn from the embryo for genetic marker analysis.
Correct Answer:
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