Jamoliddinov Yahyobek mitoz va meyoz mavzulari bo’yicha test

Jamoliddinov Yahyobek

MITOZ VA MEYOZ mavzulari bo’yicha test.


1. Inson hujayrasi hayot siklining interfaza
bosqichi tugagach xromosmalar soni (a) va
xromotidalar soni (b)nechta bo’ladi ?
A) a- 92 b-46 B) a- 46 b-46
C) a- 46 b-92 D) a- 92 b-92
2. Suvarakning interkinez davridagi hujayrasiga
tegishli ma’lumotlarni aniqlang.
1) 48 ta xromosomaga ega; 2) 24 txromosomaga ega; 3) xar bir xromosomasi ikkita DNK zanjiridan iborat; 4) xar bir xromosomasi bitta DNK zanjiridan iborat; 5) jami 46 ta DNK ga ega; 6) jami 48 ta DNK ga ega
A) 1, 3 B) 2, 5 C) 1, 4 D) 2, 3, 6
3. Meyozning qaysi bosqichida xromatidalarning har biri mustaqil xromosomaga aylanadi ?
A) telofaza I B) anafaza II
C) anafaza I D) metofaza II
4. Odam hujayra siklida interfazaning S davridan so’ng (I), mitoz bo’linishdan so’ng (II) xromosomalar soni qaysi javobda to’gri ko’rsatilgan ?
A) I- 23 II-46 B) I- 92 II- 46
C) I- 46 II-46 D) I- 92 II- 92
5. Meyoz jarayonining anafaza I bosqichiga xos
bo’lgan ma’lumotni ko’rsating.
A) xromosomalar spirallasha boshlaydi;
B) xiromotidalarni birlashtirib turuvchi belbog’ uzulib, ular mustaqil xromosomalarga aylanadi;
C) xromotidalar ajralmagan holatda qutblarga tarqaladi;
D) xromosomalar despirallashadi.
6. Daraxt barglarida jami 9 kg glukoza sintezlanishi jarayonida fotolizga uchragan suv
mollari sonini hisoblang.
A) 1200 B) 300 C) 600 D) 900
7. Odam jinsiy bezlarida kechayotgan meyoz
jarayonining anafaza II bosqichida ekvator
tekisligidan hujayraning bir qutbiga tomon
nechta xromosoma tortiladi ?
A) 46 B) 23 C) 13 D) 92
8. Meyozning qaysi fazasida gomologik xromosomalar bir-biriga yaqinlashib, malum genlar almashinadi ?
A) profaza I B) profaza II
C) interfaza D) metafaza II