The purpose of meiosis is to reduce the normal diploid cells (2 copies of each chromosome / cell) to haploid cells, called gametes (1 copy of each chromosome per cell). In humans, these special haploid cells resulting from meiosis are eggs (female) or sperm (male). In yeast cells, they are spores.
Third-party warrant is a derivative issued by the holders of the underlying instrument. Suppose a company issues warrants which give the holder the right to convert each warrant into one share at $500. This warrant is company-issued.
A warrant is a writ issued by a judge or magistrate that allows a sheriff, constable or police officer to search a person or property (search warrant), arrest an individual or individuals (arrest warrant) or execute an individual who has been sentenced to death in a trial court (execution warrant).