'Each human cell has 23 pairs of chromosomes, 1 of them this type rated XX or XY'
Sex chromosome
GENETICS: Each human cell has 23 pairs of chromosomes, 1 of them this type rated XX or XY
Each human cell has 23 pairs of chromosomes, 1 of them this type rated XX or XY
Each human cell has 23 pairs of chromosomes, 1 of them this type rated XX or XY
GENETICS
Sex chromosome
GENETICS