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126.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
127. 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
128. 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
129. 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
130.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
131.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
132. 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
133. 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
134. 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
135. 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
136. 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
137. O’simlikning changdonidan hosil bo’lgan 130 ta mikrosporaning 40 % idan hosil bo’lgan spermeydan urug’ langan tuxum hujayradan nechta murtak hosil boladi.________
138. O’simlikning urug’larida 60 har xil sporaning ko’piyishi natijasida hosil bo’lgan barcha tuxum hujayralarni urug’ lantirish jarayonida nechta chang donasi qatnashadi?________
139. Kungaboqar savatchasida 610 ta urug’ yetilgan bo’lsa, urug’lantirish jarayonida ishtirok etgan spermeylar soni nechta mikrosporadan hosil bo’lgan__________
140. Kungaboqar savatchasida 740 ta urug’ yetilgan bo’lsa, urug’lantirish jarayonida ishtirok etgan spermeylar soni?
J:_______
141. Bug’doyning diploid va tetraploid navidan olingan chang donasi bilan changlantirildi; urug’lanish jarayonida so’ng hosil bo’lgan o’simlik tuxum hujayrasida
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