Genome - The entire DNA of an organism, Gene - A section of DNA that codes for a sequence of amino acids, Chromosome - Strands on condensed DNA that contain genetic information in the form of genes., Homologius chromosomes  - " chromosomes containing the same genes which may have different alleles., Allele - An alternative form of a gene, Diploid - A cell that has 2 sets of chromosomes, Homozygous - When somebody has 2 identical alleles of a gene., haploid - A cell that contains one set of chromosomes, Heterozygous - When somebody has 2 different alleles of a gene, Dominant - an allele that is always expressed, Sister chromatids - A strand of DNA that has been split and replicated and joined by a centromere., Recessive - An allele that will only be expressed if paired with another identical recessive allele., phenotype - A characteristic expressed by genes, genotype - The genes inherited from each parent for a characteristic. ,

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