What Is Simple Inheritance? Simple (or Mendelian) inheritance refers to the inheritance of traits controlled by a single gene with two alleles, one of which may be completely dominant to the other.
|F F||Homozygous dominant||No cystic fibrosis (Normal)|
|F f||Heterozygous||Carrier (has no symptoms but carries the recessive allele)|
|f f||Homozygous recessive||Cystic fibrosis (has symptoms)|