Bio- Mutation

Bio- Mutation

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  • I think I got the "atopic dermatitis" from my dad because he also has it too and my brother didn't get this disease because my mom doesn't have it.
  • Anybody have any mutation or disease, you received from your parents? 
  • Oh yeah, my brother and sister has that too 
  • Mutation happens when the genetic sequence is changed, these changes could cause a disease.  
  • We have 23 chromosomes that determine our physical traits. Each of the pairs of 22 chromosomes has the same gene with different traits from the parents. However, the 23rd chromosome is what determines the gender and creates a mutation, and is different from the rest of the 22 chromosomes.  
  • Notes
  • The males have one X and one Y chromosomes. So they determine the sex of the embryo because both genders would already have one X chromosome from the mother. 
  • Female 
  • Male
  • When the male gives off an X chromosome, it creates a problem for the female. This is why X-inactivation exist to solve the problem. They randomly inactivate one X chromosome, which becomes a Barr body. The one chromosome that stayed active gives the traits to the baby.  
  • X: nervous system development, skeletal muscle function, reproduction, and receptors in the eyes.
  • So when we look at female twins their X-inactivation are randomly selected, causing each twin to have different or same inactivation pattern. 
  • So if one of the twins X chromosomes remains, than that twin will be colorblind because the X chromosome has the colorblind gene.  
  • Y: male development and fertility 
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