Torti pointed Siamese or Himmys are usually the result of crossing a Red or Flame pointed male - red on X Chromosome, with a female of another coloring. About half of the female offspring may be torti, which results for the Red gene on the one X Chromosome and the other gene on the second X Chromosome. Since the males of the litter get the color gene on the Y Chromosome from their dad, except for undifferentiated chromosomes which I'll discuss later, they will be colored like the mother or her recessive gene.

   Red points come from crossing red males with red or torti pointed females, with a 50% ratio of reds with the torti cross, and what should be 100% reds with the red females - red is recessive so she has no other genes.

   Occasionally, the males X&Y Chromosomes will not diferentiate, split apart in spermogenesis, so he's throwing XY sperm, which results in an XXY kitten after fertilization. These kittens may seem male and have red or torti coloring, but they are very confused inside, and are usually not fertile.

   Dave