This function converts haplotypes simulated with scrm::scrm() into
genotypes by adding the entries on one row with the entries of the subsequent
row.
hap2geno(haplo)a matrix of genotypes with half the rows of the haplo matrix. Each
column of this matrix is a different site and each row is a different
genotype.
a matrix of haplotypes obtained from the simulations done with
scrm::scrm(). Each column of the matrix is a different site and each row
is a different haplotype.