Sex chromosomes (X and Y chromosome). Allosomes. reproduction and human fertilization. In females are XX, in males are XY chromosomes. Male's sperm determines the sex of a child Longsleeve T-shirt #448075958
If you need a timeless long-sleeved t-shirt, this soft long-sleeved crew shirt is the one for you. It has a 100% combed ringspun cotton, 32 singles thread weight, 4.3 oz. fabric weight, a set-in 1x1 baby rib collar and a tear away label.
