URUGLANISH MASALALARI YECHIMI | URUGLANISH

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

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