- 2.Jinsni aniqlash
- Jinsni aniqlashning 3:progam,epigam,singam xili mavjud.
- Jinsni aniqlashning progam xilida jins urug`languncha ma`lim bo`ladi. Maslan, bazi bir chuvalchanglar,kolavratkalarda urg`ochi organizmlar odatda yirik,sitoplazmaga boy hamda mayda sitoplazmasi kam tuxum qo`yadi. Sitoplazmaga boy tuxum hujaya urug`langach urgochi, mayda sitoplazmasi kam tuxumdan esa erkak organizmlar rivojlanadi.
- Jinsni aniqlashning epigam xilida jins shakllanishi tashqi muhitga bog‘liq bo‘ladi. Misol uchun, xalqali chuvalchanglardan Bonella Viridis ni olsak, otalangan tuxum hujayradan rivojlangan lichinka mustaqil hayot kechirsa uning urg‘ochi, aksincha urg‘ochi organizmning jinsiy organida parazitlik qilib yashasa uning erkak jinsi hosil bo‘ladi.
- Bonellia worms have an even stranger system of sex determination. As larvae, ocean currentssweep these worms along until they settle on the ocean floor, where they live and grow into adult worms. All Bonellia start as females. If a larvae settles and finds itself near an adult female, it crawls into her proboscis (essentially a long, flexible snout) and develops into a tiny male worm.[90-bet]
- Jinsni aniqlashning singam xilida jins urug`lanish davridama`lum bo`ladi. Jinsni aniqlashning singam xili keng tarqalganligini va amaliy ahamiyatga ega ekanligini takidlab o`tish joizdir.
- Tara Rodden Robinson Assistant Professor (Research), Oregon State University “Genetics For Dummies” Copyright © 2005 by Wiley Publishing, Inc., Indianapolis, Indiana.90-bet.
Jinsni aniqlashning xromasoma nazariyasi. - Mendel tajribasining ko`rsatishicha, monoduragaylarni tahliliy chatishtirishda fenotip va genotip bo`yicha nisbat 1:1 bo`ladi. Agar biz turli hayvon va o`simlik turlaridagi erkak va urg`ochi organizmlar nisbatini olsak, shunga o`xshash natijani ko`ramiz.
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