High power TEM of a chromosome dyad in a dividing stage 2, 2-cell embryo in vitro 34 hours post-insemination (original magnification x33,140).
From: Trounson and Sathananthan, 1984. Reproduced with permission of Plenum Publishing Corporation.
Keywords: chromosome dyad, stage 2 embryo, two-cell embryo
Source: The Virtual Human Embryo.