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This list concerns blood type distribution between countries and regions. Blood type (also called a blood group ) is a classification of blood , based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells (RBCs).
Trisomy 21. Down syndrome (also known by the karyotype 47,XX,+21 for females and 47,XY,+21 for males) [98] is mostly caused by a failure of the 21st chromosome to separate during egg or sperm development, known as nondisjunction. [91] As a result, a sperm or egg cell is produced with an extra copy of chromosome 21; this cell thus has 24 ...
Population genomic research has studied the origin and formation of modern East Asians. The ancestors of East Asians (Ancient East Eurasians) split from other human populations possibly as early as 70,000 to 50,000 years ago. Possible routes into East Asia include a northern route model from Central Asia, beginning north of the Himalayas, and a ...
The superimposed Slovakian arms feature a dominant white cross atop a blue symbolic reference to the European country's mountains. 1991– Slovenia See also: List of Slovenian flags: The flag of Slovenia was officially adopted on 24 June 1991. Red, white, and blue are taken from the Carniolan coat of arms. The flag without the coat of arms was ...
Distribution of the Romani in Europe (2007 Council of Europe "average estimates", totalling 9.8 million) [334] Antiziganist protests in Sofia, Bulgaria, 2011 In Europe, Romani are associated with poverty, high crime rates, and behavior that is considered antisocial or inappropriate by the rest of the European population. [ 335 ]
By way of analogy, the allele (a particular version of a gene) which causes sickle cell disease when two copies are present, also confers an adaptive advantage when one copy is present by providing resistance to malaria with non-symptomatic sickle cell trait—which is known as "heterozygote advantage". [96]
Germany, [e] officially the Federal Republic of Germany, [f] is a country in Central Europe.It lies between the Baltic and North Sea to the north and the Alps to the south. Its sixteen constituent states have a total population of over 82 million in an area of 357,569 km 2 (138,058 sq mi), making it the most populous member state of the European Union.
Eukaryotic cells have a variety of internal membrane-bound structures, called organelles, and a cytoskeleton which defines the cell's organization and shape. The nucleus stores the cell's DNA , which is divided into linear bundles called chromosomes ; [ 19 ] these are separated into two matching sets by a microtubular spindle during nuclear ...