Ism1

• homologous chromosones pairs


  • Same size, genes, shape
  • Different Alleles (variant form of a gene)
• step 1

  homologous chromosomes line up randomly with their pair at equator 
• step 2

  paternal and maternal chromosomes go one side to the other randomly 
• step 3

  So combo of Xs in daughter cells are random 
• step 4

  therefore huge variety of genetic possibilities in gametes
•  Biological bro and sis look sim/diff. Because of different Xs in gametes