ngang nhau), cua gen nam tren nhiem sac the X (di truyen cheo) nam tren
nhiem sac the Y (di truyen thang). ;
D) Tat ca A, B va C. • ' ^''•'^''•^''•''"1 '
CSu 26: Nhij-ng te bao nao chiJa cap NST liTdng dong?
A ) Te bao lu'dng boi (te bao xoma, te bao sinh due sd khai, hdp tuf).
B ) Te'bao da boi (da boi chKn, da boi Ic, tirda boi, di da boi). ,.
C) Giao tuT di boi, giao tur khong giam nhiem. ^ D) Ta't ca A, B va C. • , • t D) Ta't ca A, B va C. • , • t
C f i u 2 7 : T h e n a o l a k i e u g e n d i h d p ? ^, A ) Kieu gen c6 it nhat mot cap gen di hdp.
B ) Kieu gen c6 2 alen cua mot gen khac nhau. . , C) Kieu gen trong do c6 cap alen gom alen troi va 1 alen Ian. '' "'* C) Kieu gen trong do c6 cap alen gom alen troi va 1 alen Ian. '' "'* D) Ca A, B va C deu dung. .j ^ DAP AN l . B 2.C 3. D 4. C 5. D 6. D 7. D 8. D 9. D 10. D 11. D 12. D 13. D 14. D 15. D 16. D 17. D 18. D 19. D 20. D 21.D 22. B 23. D 24. D 25. D 26. D 27. D I V . B A I T A P T V L U A N ^ ^ :
Logi 1: Xac dinh so'loai giao tijTkhac nhau ve nguon goc NST
+ Ncu CO 1 cap NST, trong do A tu'dng dong vdi a se tao thanh 2 loai giao lii'
A va a.
A B
+ Neu CO 2 cap NST, trong do — va — thi se tao thanh 4 loai giao l\i AB,
a b : ,,,, , Ab, aB, ab. Ab, aB, ab.
+ Neu CO 1, 2, 3,... n cap NST thi se tao thanh 2', 2^ 2\" loai giao tii'
(neu khong c6 trao doi doan va dot bien).
Logi 2: Xac dinh so' loai hdp tuT khac nhau ve nguon goc NST '
So hdp t^ khac nhau ve nguon goc NST bang tich cua so giao tu" do bo, mc sinh ra. , . • ;... r. ' •"•"r.:^
Lot^i 3: T i m t i le m o i k i e u giao tur
So k i e u giao liV di/dc hinh thanh la 2", trong do:
- T i le m o i k i e u giao tiJ" la — (n la so' cSp N S T )
- T i le kieu giao tuf chufa tat ca cac N S T c6 nguon goc tif bo' (hoSc me) W 1
- V i d u: 6 l d n, b o N S T 2 n = 38. H a y c h o b i e t : a) So k i e u giao tijrdiTcfc hinh thanh.
b) T i le m o i k i e u giao tiJ.
c) T i le k i e u giao tiJ chtfa tat ca cac N S T co nguon go'c tijr bo' (hoac me). d) T i le con sinh ra dtfdc d i truyen ta't ca N S T cua "ba n o i " (hoac "ong n o i " ) d) T i le con sinh ra dtfdc d i truyen ta't ca N S T cua "ba n o i " (hoac "ong n o i " )
O IcJn: 2n = 38 t h i " b o " sinh ra 2''^ k i e u giao tuTkhdc nhau, " m e " cijng sinh ra 2'^ k i e u triJng khac nhau. Nhu" vay so' to hdp khac nhau ve nguon goc N S T thu 2'^ k i e u triJng khac nhau. Nhu" vay so' to hdp khac nhau ve nguon goc N S T thu d l r c J c l a 2 ' ^ 2 ' ^ = 2^^
M a khac, so k i e u giao tuf cua " b o " chi?a tat ci 19 N S T cua "ba n o i " co the to
hdp v c . 2'^ k i e u te bao trtfng cua m e de tao nen 2"^ hdp tu' du'rtc d i truyen ta't ca 19 NS r "ba n o i " . V ^ y t i I f p h a i t i m la 2"^ 1
2"'** 2"^