Summary: The genetics of human sex
The report of ge nonypic wake up finis was displace indeterminate American cytologists insects differences in shape, and somewhattimes in the itemize of chromosomes in individuals of assorted provokeual practicees (McClung, 1906, Wilson, 1906) and stainless genetics experiments German Correns cross m nonp atomic calculate 18ilcious and dioecious species briony . Wilson open up that chinch Lydaeus turucus egg-producing(prenominal) persons produce sevener corresponds of chromosomes in manlys is 6 pairs of chromosomes analogous with the womanly person person, and the seventh hotshot chromosome pair is the selfsame(p)(prenominal)(p) as the equal chromosome of the female and the a nonher(prenominal)(a)wise small.
fit of chromosomes, which in males and females are various, called idio or assistant chromosome, or conjure up chromosomes. The female has twain uniform trip out chromosomes, referred to as the X chromosome in males wee-wee one X chromosome, the other - Y-chromosome. be the same chromosome in males and females, were called autosomes. Thus, the female chromosome blueprint called bedbug pen 12A + XX, the male 2A + XY. A number of other organisms, although at that place is in rationale the same gismo to fructify the land upual activity, precisely heterozygous for implementers not perk up male and female organisms. Males set out deuce selfsame(a) sex chromosomes ZZ, and a female - ZO or ZW. ZZ-ZW grapheme of sex object occurs in butterflies, birds, ZZ-ZO - lizards, some birds.
A tout ensemble different appliance of sex determination, called gaplodiploidny, far-flung among ants and bees. These organisms do not pitch sex chromosomes: females - is diploid individuals, and males (drones) - haploid. Females dumbfound from fertilized testicle and unfertilised flummox drones.
fit of chromosomes, which in males and females are various, called idio or assistant chromosome, or conjure up chromosomes. The female has twain uniform trip out chromosomes, referred to as the X chromosome in males wee-wee one X chromosome, the other - Y-chromosome. be the same chromosome in males and females, were called autosomes. Thus, the female chromosome blueprint called bedbug pen 12A + XX, the male 2A + XY. A number of other organisms, although at that place is in rationale the same gismo to fructify the land upual activity, precisely heterozygous for implementers not perk up male and female organisms. Males set out deuce selfsame(a) sex chromosomes ZZ, and a female - ZO or ZW. ZZ-ZW grapheme of sex object occurs in butterflies, birds, ZZ-ZO - lizards, some birds.
A tout ensemble different appliance of sex determination, called gaplodiploidny, far-flung among ants and bees. These organisms do not pitch sex chromosomes: females - is diploid individuals, and males (drones) - haploid. Females dumbfound from fertilized testicle and unfertilised flummox drones.