1 / 12

Meiosis Mistakes

Meiosis Mistakes. Human chromosome abnormalities. Nondisjunction. Failure of homologous chromosomes to separate during cell division. Results. 1 too many OR 1 too few chromosomes. Trisomy: one too many 47 chromosomes Monosomy: one too few 45 chromosomes.

kblanco
Download Presentation

Meiosis Mistakes

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. Meiosis Mistakes Human chromosome abnormalities

  2. Nondisjunction • Failure of homologous chromosomes to separate during cell division

  3. Results 1 too many OR 1 too few chromosomes

  4. Trisomy: • one too many 47 chromosomes • Monosomy: • one too few 45 chromosomes

  5. How can we diagnose these abnormalities? • Karyotypes • Picture of chromosomes in a dividing (div.) cell • Arranged in order by size

  6. Why might this be useful? • Prenatal testing • amniocentesis

  7. Down’s syndrome • Short stature • Round face • Developmental Delays • Eyelids that Cover inner corner Of eyes Trisomy-21

  8. Klinefelter’s syndrome • Affects only males • Sterile • Varying affects Extra X Chromosome

  9. Edward’s syndrome • Growth deficiency • Feeding difficulties • Breathing difficulties • Developmental delays • Underdevelopped organs • Small head • Low-set, malformed ears • Cleft lip/palate • Overlapped, flexed fingers • Trisomy 18

  10. Patau syndrome • heart defects • sloping forehead, • small or missing eyes, • low set ears, • cleft palate • extra fingers and toes • Developmental delays • Trisomy-13

  11. Who determines the sex of the child?

  12. THE FATHER!

More Related