1 / 14

Chromosomes and Karyotyping

toyah
Download Presentation

Chromosomes and Karyotyping

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. Chromosomes and Karyotyping

    2. Chromosome Structure Chromosomes under a microscope stained with dye Striped rod-shaped structure

    3. Chromosomes are found in the nucleus Chromosomes are made of a DNA strand that is tightly wound around itself and packed with protein called histones The “stripes” observed are a result of the dyes binding to the specific proteins Each chromosome pair has a unique banding pattern. Chromosome Structure

    4. Chromosome Structure During Mitosis, Chromosomes Replicate (full copy) Replicated chromosomes attach at the centromere Called sister chromotids

    5. Chromosome Structure Humans have 23 different chromosomes Humans have 2 copies of each chromosome Diploid = 2 copies Total of 46 chromosomes in EVERY Cell. Chromosome partners are called homologous chromosomes

    6. Seeing Chromosomes Joe Hin Tijo and Albert Levan—1956 Developed approach to visualize chromosomes: “Catching Chromosomes” Chromosomes condense during mitosis Treat cell with a drug to stop cell division Squash the cells and view under microscope Photograph the microscope picture Clip the picture and organize the chromosomes into a karyotype

More Related