Chromosome recombination 2 POSSIBILITY 1 POSSIBILITY 2 Metaphase of meiosis I Metaphase of meiosis ll Gametes Combination Combination Combination Combination 1 2 0 4 Minimum number of gamete types 2n,In humans,n =23 Chromosome recombination 2 Minimum number of gamete types = 2n , In humans, n = 23