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Chromosome Y

Chromosome Y. By: Jessica Betts. The Base Pair Length of chromosome Y is 58 million Base Pairs. 70-200 Genes have been found on the chromosome Represents the 2% of the total DNA cells 29% has been sequenced. Chromosome Disorders. Jacobs Syndrome Creates an extra Y chromosome Complications

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Chromosome Y

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  1. Chromosome Y By: Jessica Betts

  2. The Base Pair Length of chromosome Y is 58 million Base Pairs. • 70-200 Genes have been found on the chromosome • Represents the 2% of the total DNA cells • 29% has been sequenced

  3. Chromosome Disorders Jacobs Syndrome • Creates an extra Y chromosomeComplications • Acne • Tall Stature • Aggression

  4. Symptoms • Coxa Vara- the alteration of the angle of the Femoral neck and the Femoral Shaft - It is at a 135 degree angle, causing it to be more horizontal. • Enlarged Liver • Immaturity • Learning Difficulties • Arthritis • Campodactyly- Causes the fingers to be bent and not able to straighten • Swollen Joints

  5. Klinfelter Syndrome • Causes the mail to have lower Testosterone levels And Female like features Complications • Increased Risk of Breast Cancer And Starility

  6. Symptoms • Sparse Facial Hair • Sparse Body Hair • Rounded Body Type • Tallness • Thinness • Delayed Talking • Difficulty Reading and Writing

  7. Genes of Interest • SHOX (Short Stature Homeobox) • Essential for development of skeleton • Found on the “pseudoautosomal” on both sex cells Possible Mutations -Turner Syndrome= Causes skeleton abnormalities (such as unusual rotation of the wrist and elbow joints

  8. Located Yp11.3 • Base Pairs=505,078 • SRY (Sex determining region Y) -Causes the fetus to turn into a male Mutations • 46, XX= Causes abnormal Translocation, which is the exchange of genetic material between chromosomes • Located=Yp11.3 • Base Pairs= 2,714,895

  9. USP9Y (ubiquitin specific peptides 9 Y-linked) -Involved in sperm development Mutations -Y chromosome Infertility -Located=Yp11.2 -Base Pairs=13,322,553

  10. Will Chromosome Y Go Bye-Bye? • Researchers say that there is a dramatic loss of genes from the Y chromosome that could eventually lead to its complete disappearance… in the next few millennia. • Brian Sykes, who is a genetics Professor at Oxford University says that the reason the Y chromosome will disappear, is because the chromosome is not able to repair itself. • The reason for this is unlike the other chromosomes, the Y chromosome does not travel in a pair. So it is not able to repair itself from a mirror image after splitting. So this would cause the chromosome to disappear all together in about 125,000 years.

  11. Will Chromosome Y Go Bye-Bye? • The Y chromosome used to have as many genes as the X chromosome. Now it has less then 80 functional genes compared to its partner that has over 1,000.

  12. The End

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