A two-trait Punnett Square has 16 boxes. The probability of a cross producing a genotype in any box is 1 in 16. If the same genotype is present in two boxes, its probability of occurring doubles to 1/8 (1/16 + 1/16).
November born individuals, are blessed with two ruling Birthstones, the revered Topaz and the gentle, healing Citrine. Topaz is a gemstone exhibiting an array of spectacular colors. The stone was believed to be symbolic of the Egyptian Sun God Ra, with its brilliant golden glow and fiery intensity.
Lapis lazuli, like sapphire, is blue, which is the September birthstone color. Lapis lazuli was also a zodiac stone for Libra, which falls partly in the month of September. This September stone is believed to enhance awareness and creativity. See also Lapis Lazuli: Stone of Purity.