(i) Amniocentesis : It is a technique in which amniotic fluid is withdrawn from the uterus of a pregnant lady and the amniotic cells are cultured and studied for cytological observations to determine any chromosomal abnormalities.
(ii) Polyembryony : The phenomenon of presence of more than one normal embryo in a seed is called polyembryony. The extra embryos may be nucellar or integumental in origin. e.g., orange fruits.
