If the genes for the two traits are on the same chromosome, alleles for each trait will always appear in the same combinations (ignoring recombination). With one row or column for each allele combination, the total number of boxes in a Punnett Square equals the number of rows times the number of columns.
November Birthstone Color. The November birthstone color is usually light to dark yellow, however, topaz, the official November birthstone comes in a range of great colors such as several shades of yellow, pale green, blue, red, pink, black, and brown. Pure topaz is actually a colorless stone. The red and pink topaz gets their color from chromium.
There are two birthstones for the month of June. Alexandrite was the traditional birthstone for June, but due to its scarcity and cost, pearl has become June's common birthstone. The alexandrite was named after Czar Alexander II and is one of the most desired gems. Its color changes with the lighting surrounding the stone, which is called its phenomena. Depending upon the light, the alexandrite phenomena can have a greenish, reddish or purplish hue.