Biologiya fanidan

123. 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


124.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


125. 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


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