DNA chain – Ladders with millions rungs

Dna chain - ladders with millions rungs

DNA chain – Ladders with millions rungs

DNA chain – ladders with millions rungs – DNA strands looks like spiral ladders
with the millions rungs, each of which carries the instructions written by chemical code.
If we could unravel and stretch the DNA of a single human cell, measure the approx.
2 meters, its thickness, however, would amount to approx. 0.000002 mm. Chain DNA from
the body of one man is 16 times longer than the path from Earth to the Moon.

DNA types – Distinction between two types of DNA

DNA types - Mitochondrial_DNA_versus_Nuclear_DNADNA types - Mitochondrial DNA

DNA types – Distinction between two types of DNA

DNA types – Distinction is made between two types of DNA:

  • Nuclear DNA, in the nucleus of each cell of the human body consists of 20-25 thousand. genes. After the death of its host quickly degrades.
  • Mitochondrial DNA (mtDNA), contains only 37 genes. During the study, scientists use mtDNA, which is inherited only from the mother, it retains a relatively high resistance to the influence of sexual selection, however, it is a frequent mutations.

Migration map – Human move from Africa to Europe

Migration map - Map of migration from Africa to Europe

Migration map

Migration map – By comparing DNA oldest ancestors of modern man with newer archaeological samples produced outline map migration. It shows that the man began to movefrom Africa to Europe after the climax of the last ice age (28 thousands years ago), but before the younger Stone Age (10 thousands years ago).

Egyptian pharaohs genetic analysis

Egyptian pharaohs genetic analysis - NefertitiEgyptian pharaohs genetic analysis - AkhenatenEgyptian pharaohs genetic analysis - Tutankhamen

Egyptian pharaohs genetic analysis

Egyptian pharaohs genetic analysis – Egyptian research geneticists, ruled out the possibility of a relationship between Nefertiti, and Tutankhamun. The study based on DNA analysis revealed, to which hereditary diseases suffered the young pharaoh. In their opinion, Tutankhamun was the son of Akhenaten, also known as Amenhotep IV. Likely it is that Tutankhamun’s mother was Akhenaten‘s sister, that the king under the then prevailing custom married.

DNA helix discoverers

DNA helix discoverers - Maclyn McCarty, Francis Crick, James Watson

DNA helix discoverers

DNA helix discoverers – It was only in 1953. Two young scientists from Cambridge, the American James Watson (born 1923) and Briton Francis Crick (1916-2004) on the basis of data obtained by Rosalind Franklin (1920-1958) and Maurice Wilkins (1916-2004) We managed to discover the characteristic double helix of DNA.