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.
Alexandrite is used as a gemstone. Faceted alexandrite gems with good color change are considered very valuable, even when visible inclusions are present. The astrological sign of alexandrite is scorpio. The traditional birthstone gift for the month of June is natural alexandrite earrings or jewelry.