I bob. Molekulyar biologiyaga oid masalalari va ularning yechimlari

O’simliklarning urug’lanishiga oid masalalar

1.Sholi o’simligi 158 ta urug’ hosil qildi. Urug’lanishda qatnashgan spermatozoidlar sonini aniqlang?
A) 316 B) 158 C) 632 D) 79
2.Sholi o’simligi 158 ta urug’ hosil qildi. Uning spermatazoididagi xromasomalar soni makkajo’xorinikidan 1 taga ko’p ekanligi ma’lum bo’lsa, urug’lanishda qatnashgan spermatozoidlardagi jami xromasomalar sonini aniqlang?
A) 3476 B) 6636 C) 1738 D) 6000
3.Arpa o’simligidan 400 ta urug’ olindi. Endospermidagi xromasoma soni 33 ga teng ekanligi ma’lum bo’lsa, urug’ hosil bo’lishida qatnashgan spermatozoidlardagi jami xromasoma sonini aniqlang?
A) 8800 B) 8000 C) 7600 D) 4400
4.Yerbagir tugmachagulning changlanish jarayonida urug’chi tumshuqchasiga 23 ta chang donachasi kelib tushdi. Urug’lanishdan so ’ng 17 ta urug’ hosil bo’ldi. Urug’lanish jarayonida qatnashmagan spermatozoidlar jami sonini aniqlang?
A) 12 B) 17 C) 34 D) 6
5.Yerbagir tugmachagulning changlanish jarayonida urug’chi tumshuqchasiga 23 ta chang donachasi kelib tushdi. Urug’lanishdan so’ng 17 ta urug’ hosil bo’ldi. Urug’lanish jarayonida qatnashgan spermatozoidlar jami sonini aniqlang?
A) 12 B) 17 C) 34 D) 6
6. Na’matak endospermidagi autosoma soni 33 ga teng. Changlanish jarayonida urug’chi tumshuqchasiga 18 ta chang donachasi kelib
tushdi. Urug’lanishdan so’ng 15 ta urug’hosil bo’ldi. Urug’lanish jarayonida qatnashgan spermatozoidlardagi jami xromasomalar sonini aniqlang?
A) 360 B) 330 C) 432 D) 180
7.Olcha (a), turp (b), qalampir(c) o'simliklarining barg hujayralari kariotipida xromosomalar soni nechtaga teng?
1) 48; 2) 32; 3) 18; 4) 16; 5) 32; 6) 24; 7) 46
A) a-5; b-з; c-1 B) a-2; b-4; c-7
C) a- 2;b-3;c-l D) a-4; b-3;c-l
8. Bodring ildiz hujayrasida 14 tadan xromosoma uchraydi. Uning a) murtagida; b) tuxum hujayrasida; c) chang donasinmg vegetativ hujayrasida; d) endosperm hujayrasida nechtadan xromosoma bo'ladi?
A) a-7; b-7; c-7; d-14
B) a-14; b-14; c-14; d-21
C) a-14; b-7; c-7; d-21
D) a-14; b-7; C-7; d-14
9. Ma’lum bir meva ichida 5 ta urug’ hosil bo’ldi. Shu urug’ hosil bo’lishida qatnashgan tuguncha(a), urug’ kurtak(b), sperma(c) va tuxum hujayra(d) lar sonini aniqlang?
A) a-1; b-5; c-10; d-5 B) a-5; b-5; c-5; d-5
C) a-1; b-1; c-5; d-5 D) a-5; b-1; c-10; d-10
10.Sholi spermatozoididagi xromasomalar soni makkajo’xori gaploid to’plamidan 2 taga ko’p. Agar shingilda 27 ta don hosil bo’lgan bo’lsa, markaziy hujayradagi jami xromasoma sonini aniqlang.
A) 648 B) 972 C) 324 D) 486
11. Sholi spermatozoididagi xromasomalar soni makkajo’xori gaploid to’plamidan 2 taga ko’p. Agar shingilda 27 ta don hosil
bo’lgan bo’lsa, tuxum hujayradagi jami xromasoma sonini aniqlang.
A) 648 B) 972 C) 324 D) 486
12.Olcha va tog’olcha chatishishidan olingan chatishishidan olingan, nasl qoldira oladigan olxo’rining endospermi yadrosida nechta xromasoma bo’ladi?
A. 12 B. 24 C. 48 D. 72
13. O’simlik hujayrasida 400 ta urug’ yetilgan bo’lsa, shu urug’ni hosil bo’lishida qatnashgan chang donalari sonini aniqlang.
A) 400 B) 800 C) 200 D) 100
14. O’simlik hujayrasida 400 ta urug’ yetilgan bo’lsa, shu urug’ni hosil bo’lishida qatnashgan spermiylar sonini aniqlang.
A) 400 B) 800 C) 200 D) 100
15. O’simlik hujayrasida 400 ta urug’ yetilgan bo’lsa, shu urug’dagi tuxum hujayrani urug’lantirgan spermiylar sonini aniqlang.
A) 400 B) 800 C) 200 D) 100
16.Makkajo’xorining barg epidermisida (a), ildizning o’sish konusi hujayrasida (b), endospermida (c), tuxum hujayrasida (d), markaziy hujayrasida (e) xromasomalar sonini juftlab ko’rsating.
A) a-20; b-20; c-30; d-10; e-20
B) a-10; b-10; c-20; d-20; e-30
C) a-30; b-10; c-30; d-20; e-8
D) a-20; b-10; c-30; d-20; e-30
17.Bug’doy o’simligining diploid navidagi murtak hujayrasidagi (a), endospermida (b), markaziy hujayrasida (c), spermiy hujayrasida (d), maysaning hujayralarida (e) xromasomalar sonini juftlab ko’rsating.
A) a-14; b-7; c-21; d-12; e-14
B) a-14; b-21; c-14; d-7; e-14
C) a-14; b-7; c-14; d-21; e-2
D) a-14; b-21; c-7; d-21; e-12
18. 800 ta birlamchi spermatazoidlar meyoz va mitoz bo’lingandan so’ng hosil bo’lgan spermalarning 20% i tuxum hujayrani urug’lantirishda qatnashdi. Hosil bo’lgan murtak sonini aniqlang.
A) 1280 B) 640 C) 6400 D) 2560
19. 800 ta birlamchi spermatazoidlar meyoz va mitoz bo’lingandan so’ng hosil bo’lgan spermalarning 20% i tuxum hujayrani urug’lantirishda qatnashdi. Urug’lanishda qatnashmagan spermalar sonini aniqlang.
A) 1280 B) 3840 C) 6400 D) 2560
20. 800 ta birlamchi spermatazoidlar meyoz va mitoz bo’lingandan so’ng hosil bo’lgan spermalarning 20% i tuxum hujayrani urug’lantirishda qatnashdi. Urug’lanishda qatnashgan spermalar sonini aniqlang.
A) 1280 B) 3840 C) 6400 D) 2560
21. 800 ta birlamchi spermatazoidlar meyoz va mitoz bo’lingandan so’ng hosil bo’lgan spermalarning 20% i qo’sh urug’lanishda qatnashdi. Tuxum hujayra bilan qo’shilgan spermalar sonini aniqlang. A) 1280 B) 640 C) 6400 D) 2560
22. O’simlik hujayrasida 400 ta urug’ yetilgan bo’lsa, shu urug’ni hosil bo’lishida qatnashgan chang donalari sonini aniqlang.
A) 400 B) 800 C) 200 D) 100
2016
1. O’simlikning changdonidan hosil bo’lgan 130 ta mikrosporaning 40 % idan hosil bo’lgan spermeydan urug’ langan tuxum hujayradan nechta murtak hosil boladi.?
J: 52
2. O’simlikning urug’larida 60 har xil sporaning ko’piyishi natijasida hosil bo’lgan barcha tuxum hujayralarni urug’ lantirish jarayonida nechta chang donasi qatnashadi.? J: 60 ta