I am in intro to genetics class and I am getting really confused with the terminology: -Is a chromosome made up of 2 sister chromatids? -are the 2 sister chromatids identiical? -what's the difference between chromatins and chromatids? and between the kinetochore and centromere? -gene structure: I saw a diagram showing this for a double helix DNA strand where gene X and gene y start and end at the same location on opposite strands 5' --------GENE X--------3' 3' --------GENE Y--------5' If the 2 strands are complementary how can 2 genes be at the same location? since it's read 5' to 3' by the RNA transcriptase? Thank you so very much!