The chromosome now consists of two sister chromatids, which are connected by proteins called cohesins. The chromatids are pulled apart. Each is now considered its own chromosome. At the end of mitosis, the two daughter cells will be exact copies of the original cell.
Each daughter cell will have 30 chromosomes. The cell then splits in two by a process called cytokinesis, creating two clones of the original cell, each with 46 monovalent chromosomes. Whitefish blastula is the early stage of embryo development of whitefish. In telophase G , the chromosomes have migrated to opposite poles, the cytoplasm starts to be divided at the equator by formation of the cell membrane. Eventually, the daughter nuclei will be reconstructed, the chromatin will lose its condensation, and separation of the daughter cells will occur.
Telos is Greek for end , and this is the end. Cell H is in anaphase. College of Veterinary Medicine. We discuss how chromosomal differentiation in the Lake Whitefish system may contribute to the destabilization of mitotic and meiotic chromosome segregation in hybrids, as documented previously.
The chromosome structures detected here are still difficult to sequence and assemble, demonstrating the value of cytogenetics as a complementary approach to understand the genomic bases of speciation. Keywords: Coregonus; cytogenetics; polymorphism; salmonids; speciation; standing genetic variation. Abstract The role of chromosome changes in speciation remains a debated topic, although demographic conditions associated with divergence should promote their appearance.
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