The theoretical model builds on the concept of continental drift developed during the first few decades of the 20th century. The geoscientific community accepted plate-tectonic theory after seafloor spreading was validated in the late 1950s and early 1960s. The lithosphere, which is the rigid outermost shell of a planet (the crust and upper mantle), is broken up into tectonic plates.
These disorders are known as monogenetic disorders (disorders of a single gene). Some examples of monogenetic disorders include: 1  cystic fibrosis, 2  sickle cell anemia,3  Marfan syndrome, 4  Huntington's disease, and.5  hemochromatosis.ome examples of monogenetic disorders include: 1  cystic fibrosis, 2  sickle cell anemia, 3  Marfan syndrome, 4  Huntington's disease, and. 5  hemochromatosis.
Mitochondrial diseases are very rare. However, they are very interesting because they are genetic diseases, and yet are very different to all other types of genetic disease.Surprisingly, there is actually DNA in the body that is not on any of the 46 chromosomes.itochondrial diseases are very rare. However, they are very interesting because they are genetic diseases, and yet are very different to all other types of genetic disease.