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 T-shirt #448075958
This unisex t-shirt is a wardrobe staple that effortlessly matches any outfit. Made from robust cotton, it showcases a double-stitched neckline and sleeves for exceptional durability.
