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![](/i/favi32.png) Talabalari uchun darslikD. Turg‘un
11.Pirimidin hosilalariga nima kiradi?Genetika (A.G\'ofurov, S.Fayzullayev)D. Turg‘un
11.Pirimidin hosilalariga nima kiradi?
A. Adenin va guanin
B. Sitozin va timin
S. Adenin va uratsil
D. Sitozin va guanin
J2.Sentromera joylashishiga qarab xrom osom alar qanday xillarga
ajraladi?
A Metosentrik, submetosentrik
B. Akrosentrik, telosentrik
S. Kariokinez, sitokinez
D. A,B
www.ziyouz.com kutubxonasi
3§. Jinsiy ko4payishning sitologik asoslari
Tayanch tushunchalar:
Meyoz, reduksion, ekvatsion, leptonema,
zigonema, paxinema, diplonema, diakinez, kon’yugatsiya, sinapsis,
krossingover, xiazma, interkinez, gametogenez, spermatogenez, oogenez,
bo4inish, o4sish, yetilish va shakllanish, goniylar, spermatagoniy, oogoniy,
spermatosit I, oosit I, spermatosit P, spermatida, spermatozoid,
spermatogenez, oosit P, birinchi tartibli yo‘naltiruvchi tana, ootida, ikkinchi
tartibli y o ‘naltiruvchi tana, tuxum , sporogenez, gam etogen ez,
mikrosporogenez, megasporogenez, mikrospora, sporalarning tetradasi,
vegetativ va generativ hujayra, megasporagenez, megagametogenez,
mikropile, sinergidlar, markaziy yadro, xalaza, antipod, soxta urugcla-
nish, haqiqiy urug‘lanish, pronukleus, kariogamiya, singamiya, qo‘sh
urugUanish, partenogenez, ginogenez, androgenez, gaplofaza, diplofaza.
l.Hujayraning meyoz bo‘linishi
Jinsiy hujayralar
meyoz
bo£linish orqali amalga oshadi. Meyoz ham
mitozsingari interfazadan boshlanadi. Interfazada xromosomalar ikki hissa
ortadi. Meyoz yadroning ikkita ketma-ket bo‘linishidan iborat. Birinchi -
reduksion
bo4inishda xromosomalar soni ikki marta kamayadi. Ikkinchi
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