A typical anther of a stamen contains four microsporangia where the microsporangia form sacs or pockets (locules) in the anther (anther sacs or pollen sacs) then these undergo meiosis to form haploid spores (the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomal genes).
A typical anther of a stamen contains four microsporangia where the microsporangia form sacs or pockets (locules) in the anther (anther sacs or pollen sacs) then these undergo meiosis to form haploid spores (the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomal genes).