PGD: preimplantation genetic diagnosis
: genetic profiling of embryos before implantation
Which of the following would PGD NOT be performed on?
A. an 8 celled embryo in vitro
B. a 9 week fetus in utero
C. a sperm cell
D. a skin cell from a baby
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What scientific concept do you need to know in order to solve this problem?
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