homologous chromosomes, with allele genes on the same locus.

allele biochemistry biological biology cell centromere chamber chromatid chromatids chromatin chromosomal chromosome chromosomes cloning counting crossing diagram didatic division dna duplicate duplication erythrocytes gene genes genetic genome hemocytometer heterologous heterozygous homologous homozygous human illustration information leukocytes locus maternal medicine microbiology microscopic mitosis molecule mutation neubauer over pair paternal recombination replication reproduction reproductive same science structure telomere vector