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.
These pink crystals come from the variety of topaz called imperial topaz. The pink jewel is rather very rare. Hence, whilst other colors comes cheap, pink topaz is one of the most expensive of pink gemstones, with prices of up to $2,500 a carat. Topaz is the traditional birthstone for November.