Pairs of alternative traits segregated among progeny iv. Diploid rganisms may be heterozygous or homozygous iii. Alleles in heterozygote do not blend, segregate during gamete formation. Each gamete has equal chance of possessing either allele of a pair. Chromosomes segregate in meiosis, like Mendel's alleles.
Gametes haploid, one of each allele.
Chromosomes assort independently during meiosis. More genes assort independently than there are chromosomes. First demonstration by Curt Stern. Chromosomes show evidence of physical exchange. Genetic Maps 1.