Inheritance variation and evolution

• Gene

  A gene is a short length of DNA found on a chromosome that codes for a particular characteristic
• Allele

  Alleles are variations of the same gene.
• Genotype

  The genotype is the combination of alleles that a person has for a particular trait.
• Genome

  The genom of an organism is the entire genetic material of that organism
• Phenotype

  The observable characteristics of an organism
• Homozygous

  Homozygous means both alleles are the same
• Heterozygous

  heterozygous means that both alleles are different.