I bob. Molekulyar biologiyaga oid masalalari va ularning yechimlari

3. Kungaboqar savatchasida 610 ta urug’ yetilgan bo’lsa, urug’lantirish jarayonida ishtirok etgan spermeylar soni nechta mikrosporadan hosil bo’lgan?
J: 610
4. Kungaboqar savatchasida 740 ta urug’ yetilgan bo’lsa, urug’lantirish jarayonida ishtirok etgan spermeylar soni?
J: 1480 .
5. Bug’doyning diploid va tetraploid navidan olingan chang donasi bilan changlantirildi; urug’lanish jarayonida so’ng hosil bo’lgan o’simlik tuxum hujayrasida va markaziy hujayrasida xromosoma nechta bo’ladi?
J: 21 ta 35 ta
6. Diploid va tetraploid (n=9) bolgan karam navlaridan chatishtirishdan hosil bo’lgan zigotada xromosomalar somni?
J: 27 ta
7.Diploid va tetraploid (n=7) bolgan bug’doy navlarining chatishtirishdan hosil bo’lgan zigotada xromosomalar somni?
J: 21 ta.
8.Diploid va tetraploid qalampir navlaridan chatishtirishdan hosil bo’lgan zigotada xromosomalar somni?
J:72 ta


Blastomerlarni xosil bo’lishi
1.Lansetnik embrionidagi blastomerlar soni 64 taga yetishi uchun hujayralar necha marta meridianal va ekvatorial bo’linishi kerak?
A) 5 marta meridianal, 3 marta ekvatorial
B) 4 marta meridianal, 2 marta ekvatorial
C) 4 marta meridianal, 3 marta ekvatorial
D) 2 marta meridianal, 1 marta ekvatorial
2. Embrion blastomerlari soni 128 taga yetishi uchun u necha marta meridianal va ekvatorial bo’linishi kerak?
A) 6 marta meridianal, 3 marta ekvatorial
B) 6 marta meridianal, 4 marta ekvatorial
C) 3 marta meridianal, 3 marta ekvatorial
D) 4 marta meridianal, 3 marta ekvatorial
Mitoz , meyoz 2015
1.Uy pashshsining somatic hujayrasida xromasoma soni drozofilaga nisbatan 4 taga ko’p bo’lsa, shu hujayra siklining anafaza bosqichida qutblarga nechtadan xromasoma tarqalishini aniqlang.
A) 32 B) 48 C) 12 D) 24
2.Uy pashshsining somatic hujayrasida xromasoma soni drozofilaga nisbatan 4 taga ko’p bo’lsa, mitoz sikli anafaza oxirida xromasoma sonini aniqlang.
A) 32 B) 48 C) 12 D) 24
3.Uy pashshsining somatic hujayrasida xromasoma soni drozofilaga nisbatan 4 taga ko’p bo’lsa, mitoz sikli anafaza oxirida xro matid sonini aniqlang.
A) 32 B) 48 C) 12 D) 24
4.Uy pashshsining somatic hujayrasida xromasoma soni drozofilaga nisbatan 4 taga ko’p bo’lsa, mitoz sikli interfazadan so’ng DNK sonini aniqlang.
A) 32 B) 48 C) 12 D) 24
5.Uy pashshsining somatic hujayrasida xromasoma soni drozofilaga nisbatan 4 taga ko’p bo’lsa, mitoz sikli interfazadan so’ng xromatid sonini aniqlang.
A) 32 B) 48 C) 12 D) 24
6.Olchaga nisbatan 3 barobar ko’p xromasomaga ega o’simlikning mitoz sikli anafaza oxirida xromasoma sonini aniqlang.
A) 96 B) 192 C) 48 D) 384
7.Olchaga nisbatan 3 barobar ko’p xromasomaga ega o’simlikning mitoz sikli anafaza bosqichida qutblarga nechtadan xromasoma tarqalishini aniqlang.
A) 96 B) 192 C) 48 D) 384
8.Olchaga nisbatan 3 barobar ko’p xromasomaga ega o’simlikning mitoz sikli anafaza oxirida xromatid sonini aniqlang.
A) 96 B) 192 C) 48 D) 384
9.Olchaga nisbatan 3 barobar ko’p xromasomaga ega o’simlikning mitoz sikli interfazadan so’ng DNK sonini aniqlang.
A) 96 B) 192 C) 48 D) 384
10.Olchaga nisbatan 3 barobar ko’p xromasomaga ega o’simlikning mitoz sikli interfazadan so’ng mikronaychalar sonini aniqlang.
A) 54 B) 108 C) 0 D) 27
11.Turpning somatic hujayrasida 16 ta autosoma bo’lsa, bo’linayotgan hujayraning anafaza bosqichida xromasomalar sonini aniqlang.
A) 18 B) 36 C) 72 D) 32
12.Turpning somatic hujayrasida 18 ta xromasoma bo’lsa, bo’linayotgan hujayraning anafaza bosqichida xromatidlar sonini aniqlang.
A) 18 B) 36 C) 72 D) 32
13.Karam hujayrasida mitoz siklining G2 bosqichidagi DNK sonini aniqlang
A) 16 B) 18 C) 32 D) 36
14.Karam hujayrasida mitoz siklining G2 bosqichidagi xromasoma sonini aniqlang
A) 16 B) 18 C) 32 D) 36
15.Karam hujayrasida mitoz siklining G2 bosqichidagi xromatidlar sonini aniqlang
A) 16 B) 18 C) 32 D) 36
16.Erkak makaka somatik hujayrasida 42 ta xromasoma mavjud bo’lib, ulardagi barcha genlar gomozigota bo’lsa, silliq mushak nhujayralarida necha xil DNK bor?
A) 22 B) 21 C) 42 D) 43
17. Urg’ochi kaptarning somatik hujayrasida 80 ta xromasoma bo’lib, ulardagi barcha genlar gomozigota bo’lsa, teri hujayralarida necha xil DNK bor?
A) 41 B) 80 C) 40 D) 78
18.Urg’ochi kaptarning somatik hujayrasida 80 ta xromasoma bo’lib, ulardagi barcha genlar gomozigota bo’lsa, tuxum hujayralarida necha xil DNK bor?
A) 41 B) 80 C) 40 D) 39
20.Erkak shinshillada 78 ta xromasoma mavjud bo’lib, ulardagi barcha genlar gomozigota bo’lsa, mushak hujayralarida necha xil DNK bor?
A) 40 B) 39 C) 78 D) 76
21.Tez kaltakesak tuxum hujayrasida 19 ta xromosoma uchraydi. Somatik hujayradagi barcha genlar gomozigota bo’lsa, shu hujayrada necha xil DNK bor?
A) 38 B) 20 C) 19 D) 39
22.Qora kalamushning tuxum hujayrasidagi autosoma xromosomalari soni 20 ga teng bo‘lsa hamda embrional rivojlanishning maydalanish bosqichida hosil bo‘lgan hujayralarda jami xromosomalar 21504 taga yetgan bo‘lsa, embrion necha marta meridian yo‘nalish bo‘ylab bo‘lingan?
A) 4 B) 10 C) 6 D) 5
23.Uy tovug‘ining somatik hujayrasida 78 tadan xromosoma bo‘lsa, uning hujayrasida interfazaning G2 davridagi hujayra yadrosida nechta xromatid bo’ladi?
A) 156 B) 78 C) 312 D) 160
24.Blastomerlari 16 taga yetgan tulki embrionida jami xromosomalar soni 608 ta bo‘lsa, tulki tana hujayrasida interfazaning G2 davridagi hujayra yadrosida nechta xromatid bo’ladi?
A) 38 B) 76 C) 19 D) 152
25.Blastomerlari 16 taga yetgan tulki embrionida jami xromosomalar soni 608 ta bo‘lsa, tulki tana hujayrasida miozning anafaza davridagi hujayra yadrosida nechta xromatid bo’ladi?
A) 38 B) 76 C) 19 D) 152
26.Blastomerlari 16 taga yetgan tulki embrionida jami xromosomalar soni 608 ta bo‘lsa, tulki tana hujayrasida interfazaning G2 davridagi hujayra yadrosida nechta DNK bo’ladi? A) 38 B) 76 C) 19 D) 152
27.Kaptar tana hujayrasida 39 juft autosoma bo‘ladi. Kaptar hujayrasi xromosomalariga nisbatan 2 barobar kam xromosomaga ega bo‘lgan uy sichqoni tana hujayrasida interfazaning G2 davridagi hujayra yadrosida nechta DNK bo’ladi?
A) 40 B) 80 C) 78 D) 41
28.Kuyka hujayra siklining anafaza bosiqichida xromasoma soni 68 ta. O’rganilayotgan barcha belgilarni ifodalovchi genlar gomozigota
holatida. Erkak kuyka tana hujayrasida necha xil DNK molekulasi mavjud?
A) 17 B) 34 C) 68 D) 18

29.Xrizantema meyoz siklining anafaza II bosqichida xromasoma soni 36 ta bo’lsa, anafaza I dagi xromasoma sonini aniqlang?

A) 36 B) 18 C) 72 D) 30
30.Xrizantema meyoz siklining anafaza II bosqichida xromasoma soni 36 ta bo’lsa, interfazadagi xromasoma sonini aniqlang?
A) 36 B) 18 C) 72 D) 30
31.Xrizantema meyoz siklining anafaza II bosqichida xromasoma soni 36 ta bo’lsa, anafaza I dagi DNK sonini aniqlang?
A) 36 B) 18 C) 72 D) 30
32.Qalampir o‘simligida meyoz jarayoni buzilishi natijasida hujayradagi birinchi juft xromosoma va oltinchi juft xromosomalar ajralmay bitta qutbga to‘planishdi. Shu hujayradan hosil bo‘lgan spermalar ishtrokida urug‘langan markaziy hujayrasida xromosomalar soni nechtadan bo‘ladi?
A) 71 yoki 73 B) 46 yoki 50
C) 70 yoki 74 D) 56 yoki 58
33.Karam o‘simligida meyoz I jarayoni anormal kechishi natijasida bir juft xromosomalar ajralmay qutblarga noteng taqsimlandi. Ushbu hujayralardan hosil bo‘lgan spermiylar tuxum hujayra bilan qo‘shilsa, zigotada xromosomalar soni nechta bo‘ladi?
A) 19 yoki 17 ta B) 28 yoki 26 ta
C) 10 yoki 8 ta D) 18 yoki 19 ta
34.Sutemizuvchilarda birlamchi tuxum hujayrada interfaza davridan so‘ng 60 ta xromatida hosil bo‘ldi. Shu tuxum hujayra urug‘langandan so‘ng zigotada nechta autosoma xromosomalari bo‘ladi?
A) 30 B) 45 C) 60 D) 28
35. Pomidor o‘simligi hujayrasida qalampir hujayrasiga nisbatan ikki barobar kam xromosomalar bo‘ladi. Pomidor o‘simligi ildizining hujayrasida interfazaning G2 davridagi hujayra yadrosida DNK molekulalari soni nechtaga yetadi?
A) 24 B) 12 C) 48 D) 76
36. Karam o‘simligida meyoz I jarayoni anormal kechishi natijasida bir juft xromosomalar ajralmay qutblarga noteng taqsimlandi. Ushbu hujayralardan hosil bo‘lgan spermiylar markaziy hujayra bilan qo‘shilsa, endosperm hujayralarida xromosomalar soni qancha bo‘ladi?
A) 10 yoki 8 ta B) 28 yoki 26 ta
C) 19 yoki 17 ta D) 18 yoki 19 ta
37. Spermatogenez jarayonidan so’ng 100 ta spermatazoid hosil bo’lgan bo’lsa, boshlang’ich spermatazoidlar sonini aniqlang.
A) 100 B) 400 C) 25 D) 50
38. Tovuq tuxum hujayrasida 24 ta xromasoma mavjud. Shu xromasomalarga birikkan genlar guruhi sonini aniqlang.
A) 24 B) 23 C) 48 D) 12

39. Tovuq tuxum hujayrasida 24 ta xromasoma mavjud. Shu hujayradagi autosomalar sonini aniqlang.

A) 24 B) 23 C) 48 D) 12
40. Tovuq tuxum hujayrasida 24 ta xromasoma mavjud. Shu hujayradagi jinsiy xromasomalar sonini aniqlang.
A) 24 B) 23 C) 2 D) 1
41. Meyoz anafaza I da 36 ta xromasoma bo’lsa, birlamchi jinsiy hujayrada nechta xromasoma bo’ladi.
A) 18 B) 36 C) 72 D) 54
42. Meyoz anafaza I da 36 ta xromasoma bo’lsa, birlamchi jinsiy hujayrada nechta xromatida bo’ladi.
A) 18 B) 36 C) 72 D) 54
43. Meyoz anafaza II da 36 ta xromasoma bo’lsa, profaza I dan keyingi xromatidalar sonini aniqlang.
A) 18 B) 36 C) 72 D) 54
44. Meyoz anafaza II da 36 ta xromasoma bo’lsa, profaza I dan keyingi xromasomalar sonini aniqlang.
A) 18 B) 36 C) 72 D) 54
45. Meyoz interkinezida 18 xromasoma bo’lsa, birlamchi jinsiy hujayrada xromasoma sonini aniqlang.
A) 18 B) 36 C) 72 D) 54
46. Meyoz interkinezida 18 xromasoma bo’lsa, birlamchi jinsiy hujayrada xromatida sonini aniqlang.
A) 18 B) 36 C) 72 D) 54
47. Meyoz metafaza I da 36 ta xromasoma bo’lsa, profaza II da xromasomalar sonini aniqlang.
A) 18 B) 36 C) 72 D) 54
48. Meyoz metafaza I da 36 ta xromasoma bo’lsa, profaza II da xromatidalar sonini aniqlang.
A) 18 B) 36 C) 72 D) 54
49. Meyoz anafaza II da 72 ta xromatida bo’lsa, telofaza I da xromasomalar sonini aniqlang.
A) 18 B) 36 C) 72 D) 54
50.Vilvichiya mirablisning somatik hujayrasidagi hujayra markazi tarkibida nechta triplet bo’lishini aniqlang?
A) 27 B) 9 C) 0 D) 18
51. Turpda birlamchi jinsiy hujayra xromasomalarini ikki qutbga tarqalishiga to’sqinlik qiladigan eritma tomizilganda urug’langan tuxum hujayradagi xromasomalar sonini toping.
A) 18 B) 27 yoki 9 C) 9 yoki 18 D) 36