Non-canon Andorian: Difference between revisions

The gender determining [[http://en.wikipedia.org/wiki/Chromosome chromosomes]] are called S, C, and T (rougly analogus to the Terran X and Y).  Each Andorian has three of these chromosomes and the combination determins gender.  The individual is Shan if they have SSS, Chan if they have SSC, Thaan if they have SST, and Zhan if they have SCT.  Each [http://en.wikipedia.org/wiki/Gamete gamete] contain only one of the three.  Shan eggs always have a S chromosome.  Thaan and Chan sperm have a 50% chance of containing a S, or either a T or C respectively.  The reason its not 33% chance of an S is because during early development, the second S chromosome in the Thaan and Chan undergoes and chemical change that isolates it from the other chromosomes and is expessed from the cells during [[http://en.wikipedia.org/wiki/Meiosis meiosis]].  Although punnant squares are usually used to show the genotype probabliliy of offspring, it works on the same prinipal for chromosomes as far a gender is related.