) oogamiya; 2) izogamiya; 3) geterogamiya




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10 - sinf test

1) oogamiya; 2) izogamiya; 3) geterogamiya.
a) erkak va urg‘ochi gametalar harakatchan, lekin urg‘ochi gametalar erkak gametalarga nisbatan yirik bo‘lishi bilan xarakterlanadi;
b) jinsiy ko‘payishning bir shakli bo‘lib, urg‘ochi gametalar yirik, harakatsiz, tuxum hujayra deb ataladi, erkak gametalar mayda bo‘lib, harakatchan bo`lib spermatozoid deb ataladi;
c) shakli va o‘lchami bir xil, harakatchan erkak va urg‘ochi gametalarning qo‘shilishi bilan boradigan jinsiy ko‘payish shakli
A) a – 1; b – 2; c – 3 B) a – 1; b – 3; c – 2
C) a – 3; b – 1; c – 2 D) a – 2; b – 1; c – 3
34. Urg‘ochi gametalar yirik, harakatsiz, erkak gametalar mayda harakatsiz (a), harakatchan (b) organizmlarni aniqlang.
A) a – terak; b – zorka
B) a – ulotriks; b – norka
C) a – yo`sinlar; b – quyon
D) a – qirqquloq; b – qirqbo`g`im
35. O`simliklarda erkaklik gametalar yetilish ketma ketligini aniqlang.
1) generative hujayra ikkiga bo`linib sperma xosil qiladi;
2) chang xaltasidagi diploid mikrosporotsit hujayra meyoz yo‘li bilan bo‘linadi 3) mikrospora yirik vegetativ va mayda generativ hujayralar hosil qiladi
A) 1,2,3 B) 1,3,2 C) 2,3,1 D) 3,2,1
36. Gulli o‘simliklarda jinsiy hujayralar hosil bo`lishida qatnashuvchi hujayralar kariotipi to`g`ri berilgan qatorni aniqlang.

T/r

Hujayra nomi

kariotip

1

mikrosporotsit

2n

2

chang donasi

N


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) oogamiya; 2) izogamiya; 3) geterogamiya

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