Diseases

• More than 20 human genetic diseases exist, including many commonly known and lesser-known diseases. Down's syndrome, color blindness and cystic fibrosis are a few examples of human genetic diseases.
  
  

Heredity

• Genetic diseases pass through families like red hair and chin dimples. If the disease affects one or both parents, the disease can transfer because of dominate genes. If neither parent has the disease but past family members did or do, the disease transfers as a recessive gene.
  
  

Inheritance Types

• In hereditary genetic diseases, there are four main types of genetic inheritance modes used to describe mutations and growth of genes and chromosomes: single gene inheritance, multifactorial inheritance, chromosome abnormalities and mitochondrial inheritance.
  
  

Spontaneity

• Some genetic disorders develop as an embryonic mutation. In these cases, no family history of the disease appears.
  
  

Specifics

• Some genetic diseases can be determined specifically; Down syndrome is recognizable by a missing chromosome. Other genetic diseases like diabetes and mental illnesses leave behind such complex inheritance patterns that genetic exactness is hard to understand.