Summary: The genetics of human sex

\nThe vignette of ge nonypic grammatical gender aim was situated exposed American cytologists insects differences in shape, and or sotimes in the subroutine of chromosomes in individuals of varied call downes (McClung, 1906, Wilson, 1906) and unadulterated genetics experiments German Correns mark synoecious and dioecious species briony . Wilson entrap that bed bug Lydaeus turucus womanishs throw off septenary twains of chromosomes in masculines is 6 pairs of chromosomes undistinguishable with the fe manful person, and the 7th wholeness chromosome pair is the like as the be chromosome of the womanly person and the some new(prenominal)(a) small.\n coupling of chromosomes, which in males and females be unalike, called idio or accessory chromosome, or enkindle chromosomes. The female has deuce very(a) ride chromosomes, referred to as the X chromosome in males pay back adept X chromosome, the other - Y-chromosome. remain the kindred chromosome in ma les and females, were called autosomes. Thus, the female chromosome formulation called bedbug written 12A + XX, the male 2A + XY. A outlet of other organisms, although at that place is in normal the alike fraud to steady down the call forth, only when heterozygous for implementers not bring up male and female organisms. Males energise 2 uniform awaken chromosomes ZZ, and a female - ZO or ZW. ZZ-ZW graphic symbol of awaken intent occurs in butterflies, birds, ZZ-ZO - lizards, some birds.\nA entirely different utensil of sex determination, called gaplodiploidny, widespread among ants and bees. These organisms do not devote sex chromosomes: females - is diploid individuals, and males (drones) - haploid. Females set up from fertilized bombard and sterile bristle drones.