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  2. ABO blood group system - Wikipedia

    en.wikipedia.org/wiki/ABO_blood_group_system

    The gene encodes a glycosyltransferase—that is, an enzyme that modifies the carbohydrate content of the red blood cell antigens. The gene is located on the long arm of the ninth chromosome (9q34). [32] The I A allele gives type A, I B gives type B, and i gives type O. As both I A and I B are dominant over i, only ii people have type O blood.

  3. Body hair - Wikipedia

    en.wikipedia.org/wiki/Body_hair

    Arm hair grows on a human's forearms, sometimes even on the elbow area, and rarely on a human's bicep, triceps, and/or shoulders. Terminal arm hair is concentrated on the wrist end of the forearm, extending over the hand. Terminal hair growth in adolescent males is often much more intense than that in females, particularly for individuals with ...

  4. Fibroblast growth factor receptor 2 - Wikipedia

    en.wikipedia.org/wiki/Fibroblast_growth_factor...

    FGFR2 has important roles in embryonic development and tissue repair, especially bone and blood vessels. Like the other members of the fibroblast growth factor receptor family, these receptors signal by binding to their ligand and dimerisation (pairing of receptors), which causes the tyrosine kinase domains to initiate a cascade of intracellular signals.

  5. Sex differences in human physiology - Wikipedia

    en.wikipedia.org/wiki/Sex_differences_in_human...

    The human genome consists of two copies of each of 23 chromosomes (a total of 46). [1] One set of 23 comes from the mother and one set comes from the father. [1] Of these 23 pairs of chromosomes, 22 are autosomes, and one is a sex chromosome. [1]

  6. Human Protein Atlas - Wikipedia

    en.wikipedia.org/wiki/Human_Protein_Atlas

    The Subcellular [7] section of the Human Protein Atlas provides high-resolution insights into the expression and spatiotemporal distribution of proteins encoded by 13147 genes (65% of the human protein-coding genes). For each gene, the subcellular distribution of the protein has been investigated by immunofluorescence (ICC-IF) and confocal ...

  7. Human Y-chromosome DNA haplogroup - Wikipedia

    en.wikipedia.org/wiki/Human_Y-chromosome_DNA_ha...

    In human genetics, a human Y-chromosome DNA haplogroup is a haplogroup defined by specific mutations in the non-recombining portions of DNA on the male-specific Y chromosome (Y-DNA). Individuals within a haplogroup share similar numbers of short tandem repeats (STRs) and single-nucleotide polymorphisms (SNPs). [ 2 ]

  8. Human variability - Wikipedia

    en.wikipedia.org/wiki/Human_variability

    Examples of human phenotypic variability: people with different levels of skin colors, a normal distribution of IQ scores, the tallest recorded man in history - Robert Wadlow - with his father. Human variability, or human variation, is the range of possible values for any characteristic, physical or mental, of human beings.

  9. Cline (biology) - Wikipedia

    en.wikipedia.org/wiki/Cline_(biology)

    In biology, a cline is a measurable gradient in a single characteristic (or biological trait) of a species across its geographical range. [1] Clines usually have a genetic (e.g. allele frequency, blood type), or phenotypic (e.g. body size, skin pigmentation) character.