1 / 9

Chromosomes Analysis

Chromosomes Analysis. Fruit Fly. Why Fruit Flies? . Small size Easy to handle Short generation time (10 – 12 days) Many offspring Many variations or mutations 4 pairs of chromosomes 100 times larger than human chromosomes. Chromosome Mapping.

monte
Download Presentation

Chromosomes Analysis

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 Analysis Fruit Fly

  2. Why Fruit Flies? • Small size • Easy to handle • Short generation time (10 – 12 days) • Many offspring • Many variations or mutations • 4 pairs of chromosomes • 100 times larger than human chromosomes

  3. Chromosome Mapping • Thomas Hunt Morgan 1st used fruit flies in 1907 and in 1911 he recognized that the banding patterns were constant in their location and number. • Morgan also noticed that any irregularity in the banding pattern was reflected in abnormal fruit flies • After many years of research geneticists chromosome maps were constructed

  4. Mutations • 1921 – H. J. Muller discovered that genes can mutate • He induced mutations in fruit flies by exposing them to x-rays.

  5. Drosophila Chromosomes • 4 chromosomes • The 1st chromosome is the X chromosome • Chromosome numbers 1- 3 are large and chromosome number 4 is extremely small • The chromosomes contain thousands of gene of which only 48 will be included in our map • Many of these genes are also found in humans

  6. X chromosome – chromosome 1 • White Eye • Vermillion Eye • Bar Eye • Hexokinase

  7. Chromosome 2 • Dumpy Wing • Black Body • Cinnabar Eye • Vestigial Wing

  8. Chromosome 3 • Sepia Eye • Scarlet Eye • Hairless • Ebony Body

  9. Chromosome 4 • Eyeless

More Related