Terms

• What is an allele?

  Different versions of the same gene
• What is a dominant allele

  Dominant alleles will show their affect even if the individual only has one copy of this allele
• What is a recessive allele


  Recessive alleles will only show their effect if the individual inherits two copies of the allele, one from the mother and one from the father
• What is a genotype


  The set of genes in DNA responsible for a particular trait
• What is a phenotype?


  The physical expression of those genes,
• What is heterozygous?


  Possessing two different alleles for a particular gene ( one dominant and one recessive)
• What is homozygous?


  Possessing the same alleles for a particular gene
• What is a carrier?

  An individual that carries a recessive gene for a disease and is capable of passing it on, however they do not display the symptoms of the disease
• What does being affected mean?

  An individual that has inherited mutated genes and displays symptom of the disease
• What does being non-affected mean?

  An individual who has not inherited faulty genes and is not affected by a genetic disease