Isochromosome - chromosome with identical arms - rare genetic disorder - видео

An isochromosome is a chromosome that has lost one of its arms and replaced it with an exact copy of the other arm. This is sometimes seen in some females with Turner syndrome or in tumor cells. This may also cause an isochromosome to have two centromeres. The chromosome arm is already copied during S phase of the cell cycle. During mitosis or meiosis I or II the sister chromatid sets line up along the midline in metaphase. The affected chromosome simply lines up at a right angle to its normal pos...
Источник видео: RuTube.ru (Наука)