Biology Reference
In-Depth Information
Fig. 5.22 Centrioles in a normal 2PN embryo a two-cell blastomere. b Centriole located
pivotally in a dividing four-cell blastomere. c Double centriole in a three-cell blastomere, located
next to its nucleus d Centriole in a eight-cell blastomere x25,000, x8,500 x20,000 (Sathananthan
et al.
1996
)
Fig. 5.23 Centriolar duplication in ICM cells of blastocysts. When centrioles duplicate at the
onset of mitosis, the daughter centriole grows from the side of the mother, as is usual. Three of
the four centrioles are shown on the left and two on the right during duplication. Note abundance
of PCM around typical centrioles (right) x85,000 (
www.sathembryoart.com
)
