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.
Iberian Peninsula residents – Initially isolated groups
Iberian Peninsula residents – Initially isolated groups – Researchers from the University of Leicester
managed to develop genes inhabitants of the Iberian Peninsula. They found that initially isolated
groups of Arabs, Sephardic, Jews and Christians in the past, often intermingled.
Conducive to religious conversions, which often be forced ethnic minorities.
Dyslexia gene and hand
Dyslexia gene and hand – In 2007. Scientists from Oxford University, who studied in children with dyslexia association preference of a particular hand, have discovered a gene LRRTM1. It is assumed that it is one of the strongest factors that cause the appearance of left-handed. This could also explain heredity left-handedness. If both parents are left-handed, the likelihood that their child will be left-handed, is 26%.
Animal olfactory opportunities
Animal olfactory opportunities – Researchers at the University of Tokyo compared the number of genes responsible for the sense of smell in 13 mammals, including man. It turned out that of all the animals tested was the elephant has the most olfactory genes – in 1948. In second place came the rat (1207 genes), followed by the cow (1186 genes). Dogs of 811 genes were in the middle of the statement, and a man of 396 genes was ninth. Worst fell orangutan, which has only 296 olfactory genes.
Addictive sunbathing – Causes endorphin production
Addictive sunbathing – The need exposure to the Sun, as the most important source of vitamin D, we encoded in the genes. UV radiation causes the body’s production of endorphins. The hormones of happiness, of which we can be quite addictive.
Communication system – Can be extremely varied
Communication system – Ant communication system is more complex than previously assumed zoologists. The team prof. Neil Tsutsui from the University of Berkley read the genome of Argentine ants and counted with them until 367 genes associated with the sense of smell, while these genes in bees is only 167, in mosquitoes 79. This means that the substances secreted by the ants communication can be extremely varied and provide a lot of information.
Homosexuality among humans
Homosexuality among humans – In 2005 year team of dr. Brian Mustanski from Northwestern University argued that in terms of the three joint genes. However, it proved true in every case studied. Today carefully geneticists say that in the case of homosexual men phenomenon is too complex for it to depend only one gene. The game can also enter epigenetic factors, or chemical “additions” to the DNA strands.
Yeast milk – Longing for the taste of cow’s milk
Yeast milk – Longing for the taste of cow’s milk, but professing an orthodox vegan scientists from the US. Solved their problem by introducing into yeast cells cow genes for the synthesis of milk components. In a similar way is prepared for quite a time certain medications. The milk milked from yeast has a chance to appear in stores in two years.
Human genetic material – Stored in trillions of cells
Human genetic material – The entire human genetic material stored in trillions of cells in the body. In the form of DNA. Suddenly weighed about 65 grams.