inheritance

• Phenotype


  The observable characteristics of an organism.
• What factors affect an organisms phenotype?

  Genes, the environment or a combination of both
• Gene


  A section of a molecule of DNA that codes for a specific protein
• Allele


  An alternative form of a gene
• Genotype


  genetic makeup of an individual
• Dominant allele


  The characteristic that is expressed in the phenotype even if only one of the alleles is inherited
• Recessive allele

  The characteristic that is expressed in the phenotype only if both alleles are inherited
• Heterozygous

  The genotype where one of each alleles is present - dominant and recessive
• Homozygous

  The genotype where both of the same alleles are present - could be both dominant or both recessive
• Genome

  All the DNA in an organism