So, say I get a set of chromosomes from my Mum which contains the X chromosome and the same from my Dad, but with the Y chromosome. I now have two sets of the same 22 chromosomes, plus an X and a Y.

For chromosome number one for example, is everything from my Dad’s side activated? My Mum’s? Or is is a random selection of genes within each chromosome?

And does the X chromosome do anything for me, or is it turned off, and only used if I pass it on to the next generation?

Follow up question: I believe that women actually recombine their X chromosomes when passing these on, but men can’t recombine X and Y. So everything on your Dad’s side stays the same. Does this have any impact? For example are you more likely to inherit genetic defects from your Dad’s side?

  • A_A@lemmy.world
    0·
    5 months ago

    You might absolutely be right about the meaning of O.P.s’ (confused) question. But still i hope at least i answered o.k. from this part :

    And does the X chromosome do anything for me, or is it turned off, and only used if I pass it on to the next generation ?

    P.S. : You asked :

    Not every combination is being tried in the egg during fertilization, right ?

    Gene selection is made before the synthesis of the gametes : for instance a male having XY will produce sperms, each one with either an X or with a Y.