Labeled Sperm Cell Diagram mitosis chromosome segregation occurs routinely as a step in cell division see mitosis diagram As indicated in the mitosis diagram mitosis is preceded by a round of DNA replication so that each chromosome forms two copies called chromatids These chromatids separate to opposite poles a process facilitated by a protein complex Labeled Sperm Cell Diagram cell biology the nucleus pl nuclei from Latin nucleus or nuculeus meaning kernel or seed is a membrane enclosed organelle found in eukaryotic cells Eukaryotes usually have a single nucleus but a few cell types such as mammalian red blood cells have no nuclei and a few others including osteoclasts have many Cell nuclei contain most of the cell visitors We re asking for your help For over 20 years the Learn Genetics website has provided engaging multimedia educational materials at no cost Learn Genetics is one of the most used science websites Labeled Sperm Cell Diagram pet informed veterin...