Łańcuch DNA – Drabiny z milionami szczebli

Łańcuch DNA – Drabiny z milionami szczebli

Łańcuch DNA – Drabiny z milionami szczebli

Łańcuch DNA – 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.

Rodzaje DNA – Różnica pomiędzy 2 typami DNA

Rodzaje DNA – Różnica pomiędzy 2 typami DNARodzaje DNA – Różnica pomiędzy 2 typami DNARodzaje DNA

Rodzaje DNA – 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.

Mapa migracji – Człowiek ruszył z Afryki do Europy

Migration map - Migration in Europe-blank_mapMigration 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).

Genetyczna analiza Egipskich faraonów

Genetic analysis of pharaohs - Nefertiti  Genetic analysis of pharaohs - Akhenaten  Genetic analysis of pharaohs - Tutankhamen

Genetic analysis of pharaohs

Genetic analysis of pharaohs – 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.

Odkrywcy helisy DNA

DNA helix discoverers - McCarty_with_Francis_Crick_and_James_D_WatsonDNA 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.