5-sinf botanika i-chorak uchun test savollari

9-sinf .Biologiya fanidan IV chorak testi.
1.Drozofilada xromosoma to’plami diploid holda nechta ?
A. 6 ta B. 7 ta C. 8 D. 10
2. Polimer hodisasini dastavval kim o’rgandi ?
A. Nilson Ele B. Ber C. Mendel D. T. Shvann
3. Fenotipda bir dominant genning allel bo’lmagan ikkinchi dominant gendan ustunlik
qilishi nima deyiladi ?
A. ingibator B. epistaz C. pleyotropiya D. alle
4. Bitta genning bir qancha belgining rivojlanishiga ta’siri ?
A. ingibator B. epistaz C. pleyotropiya D. allel gen
5. Genetik materialning irsiy o’zgarishi nima deyiladi ?
A. irsiy o’zgaruvchanlik B. mutatsiyalar C. fenotip D genotip
6. Mutatsiyalar necha xil bo;ladi ?
A. 2 xil B. 3 xil C. 4 xil D. 5 xil
7. O’zgargan mutatsiyaga uchragan gen nima ?
A. nuqtali B. somatik C. xromosoma D. fenotip
8. Xromosoma tuzilmasining o’zgarishi nima ?
A. xromosoma mut-ya B. nuqtali mut-ya C. somatik D. xromatin
9. Rentgen nurlari ta’sirida mutatsiyalar paydo bo’lishini necha marta oshirishga
erishilaadi ?
A . 130 marta B. 140 marta C. 150 marta D. 160 marta
10. Himalay quyonlarini necha gradusda boqilsa, uning hamma juni oq rangda bo’ladi ?
A. 15 c⁰ B. 27 c⁰ C. 30 c⁰ D.17 c⁰
11. Hozirgi vaqtda odamda qanchaga yaqin normal va potolgik belgilari nasldan-naslga
o’tadi ?
-------------------------------------------------------------------------------------------------------------

12. Og’ir ruhiy kasallikning yana bir nomi ?

-------------------------------------------------------------------------------------------

13. N.I. Vavilov madaniy o’simliklarning kelib chiqishini nechta markazga bo’lgan ?

---------------------------------------------------------------------------------------------------

14. O’zbekistonda nechadan ortiq uzum navlari mavjud ?/

-----------------------------------------------------------------------------------------------------------
15. O’zbekiston chorvachilik institutida M.M. Bushev tomonidan yaratilgan qoramol zoti
qachondan uchitiladi ?
---------------------------------------------------------------------------------------------------------------