Odam jinsi va belgilarning jins bilan birikkan holda irsiylanishi

Jinsni bеlgilashda xromosomalar va gеnlarning roli

• Jinsni bеlgilashda xromosomalar va gеnlarning roli
• Jinsi xromosomalarning: Bu Xromosomalarning jins aniqlash. inson xujayralari ikki jins X romosomalarning o'z ichiga oladi. Agar ayol bo'lsangiz, Agar ikki X xromosomalari bo'ladi, va siz erkak bo'lsangiz, sizda bir X va Y xromosomalarini bor.
• Autosoma xromosoma: autosomalar shunchaki somatik xromosomalarini anglatadi. Shunday qilib, insonda 44 autosoma xromosomalari bo'ladi. Odamlarda, xromosoma juft keladi. Bu degani agar noyob shaklidagi autosoma xromosomalarga plus 1 juft 22 juft bor 23 xromosoma juft jami jinsiy xromosomalarning bo’ladi. Xromosomalarning raqamlar bilan belgilangan - 1 Shunday qilib, 22 orqali, siz ikki bor xromosoma 1c, ikki 2c, va hokazo.
• Sex chromosomes: These chromosomes determine gender. Human cells contain two sex chromosomes. If you’re female, you have two X chromo­somes, and if you’re male, you have an X and a Y chromosome.
• Autosomal chromosomes: Autosomal simply refers to non-sex chromo­somes. So, sticking with the human example, do the math, and you can see that humans have 44 autosomal chromosomes.
• Ah, but there’s more. In humans, chromosomes come in pairs. That means you have 22 pairs of uniquely shaped autosomal chromosomes plus 1 pair of sex chromosomes, for a total of 23 chromosome pairs. Your autosomal chromosomes are identified by numbers — 1 through 22. So, you have two chromosome 1s, two 2s, and so on. 42-bet
• Tara Rodden Robinson Assistant Professor (Research), Oregon State University “Genetics For Dummies” Copyright © 2005 by Wiley Publishing, Inc., Indianapolis, Indiana.42-bet.

Jinsni aniqlashda balans nazariyasi.

• 1922 yili amerikalik genetik K.Bridjes bir nechta triploid 3X+3A drozofila meva pashshalarini aniqladi. Bu triploid pashshalar hayotchang bo’lib normal diploid XY+2A erkak pashshalar bilan chatishganda jinsiy xromosomalari va autosomalari turli sonda va kombinaSiyada bo’lgan 8 xil formalar hosil qildi: 1)3X:3A, 2)2X:2A, 3)[2X+y]:2A, 4)2X:3A, 5)[2X+Y]:3A, 6)XY:2A, 7)3X:2A, 8)XY:3A. Bunga asosiy sabab triploid urg’ochi pashsha gametogenezda xromosomalarni normal tarqalishini buzilishi oqibatida turli xromosoma to’plamli gametalar hosil bo’lishidir. Olingan 8 xil pashshalarni to’rtta guruhga ajratish mumkin:
• 1) Normal urg’ochi va erkaklar,
• 2) Interseks(germofrodit) – oraliq formalar,
• 3) O’ta erkak formalar(ular odatda bepusht bo’ladi),
• 4) O’ta urg’ochi formalar (bepusht).
• K.Bridjes drozofila meva pashshasida jins X va Y xromosomalarning mavjudligi bilan emas, balki jinsiy xromosomalarning autosomalarga bo’lgan nisbati (X:A) bilan belgilanishini ta'kidladi.