1 / 7

Confusing Facts

Confusing Facts. 46 chromosomes in human cells 23 pairs Above metaphase cells showing replicated sister chromatids joined at centromere When in X formation they are sister chromatids , only found during M phase otherwise Found as single chromosomes in cells but two copies of each.

najwa
Télécharger la présentation

Confusing Facts

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Confusing Facts

  2. 46 chromosomes in human cells 23 pairs Above metaphase cells showing replicated sister chromatids joined at centromere When in X formation they are sister chromatids, only found during M phase otherwise Found as single chromosomes in cells but two copies of each.

  3. G1 phase S phase M phase Interphase

  4. At the beginning of cell division (S-phase), the DNA is replicated, producing two identical copies of DNA, which are connected to each other at the centromere. • This replicated X-like structure is now called a sister chromatid pair. • A chromatid is therefore just one of the strands.

  5. When a cell divides, the sister chromatids separate, and each daughter cell receives one of the strands. • The chromatid then decondenses back into a long single chromatin strand when the new cell goes into interphase.

  6. One from each parent with Same/different alleles One from each parent with Same/different alleles

More Related