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 Tote Bag #448075958
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 Tote Bag #448075958