False-colour transmission electron micrograph (TEM) of an oocyte (a female sex cell) following its penetration by a single human spermatozoon during fertilisation. The sperm has entered the oocyte and its head begins to expand and de- condense. The 23 male chromosomes that were packed into the arrow-shaped head start to relax prior to being united with their counterparts in the female pronuclei. The oocyte now contains two pronuclei,each of 23 chromosomes. Magnification: x1000 at 35mm size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Edelmann |
Bildgröße: | 4926 px × 3437 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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