nitit rang gen a gdy bQnh bach tang.[r]
Trang 1so clAo DUC vA oAo r4o
riNn rnAl NcuY0N
THI CHQN HQC SINH GIOI LOP 9 TIICS
NAvt HQC zors -2016
nnON sINIr HQC
Thdi gian: 150 phrit fthhng ke thdt gian giao dd)
Nedv tJtt:051412016 D6 thi edm2 trang, 10 cdu h6i, m6i cdu2,0 diOm.
BB CUINH THTTC
CAU 1
a T+i sao ngudi talqi tiiSp m5u qua dudrng tinh m4ch md kh6ng phai bdng
duong dQng m4ch?
-
U Mau o dQng m4ch ludn nhi6u khi 6xi vd it khi cacbdnic hcrn m6u 0 tinh m4ch
ld dring hay sai? Vi sao?
Ciu 2
MOt t6 bdo mArn sinh dgc dgc vq mQt ti5 bdo mAm sinh dUc chi cua mQt lodi nguy6n phdn vdi sO tan bdng nhau Chct6 bdo con duq-c tqo.ru dAu tham gia gi6m phdn
ffi; r6d cenei;2O tinh trung vd tnmg Sd luqng nhi6m sic thO (NST) dcrn trong c6c tinh trirng nhi6u hcrn trong c6c trimg la 3648'
a.-x6cdinh s6 tuqrrg tinh trung, s6luqng tnmg dugc tao thenh.
b X6c dinh b0 NST lu0ng bQi cria lodi'
r fi"n sO NSf don mi m6i trulng nQi bdo cung crip cho qu5 trinh nguy€n phdn oila cdct6 bdo mAm sinh duc.
Ciu 3
a Trinh bdy c6c phumg ph6p t4o uu thO lai o cdy o61g3, ! tA , ,
b Lai kinh tC n iif Tai sio ngudi ta kh6ng dtng con lai kinh t0 dO nh6n gi6ng?
Ciu 4
Hdy so sanh qu6 trinh t6ng hqrp ADN vd mARN'
Ciu 5
O thgc vAt, khi cho t.u thg phAn o cAy giao phdn c6 hiQn tyqng tho6i ho6 MQt
thc he * ri- prra" ro-ioo/" n6" gen Aa, Jl" qqy phdn 1i0n ti6p qua c6c the hQ.
a Hdy x6c dinh ti lQ ki6u gen cira F3 (sau 3 lAn tg thU phan) vd F5 (sau 5 lAn t.u
thp phAn).
b Tt thi dU ndy hdy rfitnnguy€n nh6n ctra hiQn tuqng tho6i ho6 gi6ng khi cho
t.u thp ph6n o cdY giao Ph6n.
CAU 6
a Thudng biQn ld gi? Trinh biy dflc di6m bi6u hiQn cira thudng bitin'
b Ldm th6 ndo Oe Ui6t mot bitin di ndo t16 ld thucrng bi6n hay dQt bi6n?
Ciu 7
Gen B c6 t6ng s6 nucl66tit le-3000, sO li6n tc0t tridrO la 3500, gen ndy.bi dQt bi6n mAt 6 nucl66titinann gen b Bict khi gen B vd b t.u nhdn d6i li6n ti€p 3 ldn, sd
nucl€dtit lopi Ad€nin mdi t**g cung c6p cho gen b it hcrn gen B ld 14 nucl06tit'
a Gen B g6m bao nhiOu chu lcj'xodn?
b X6c dinh chiAu ddi cria gen B vd gen b'
c Xiic dinh sO 1i0n k6t hidr6 cria gen b'
Trang 2Cf,u 8
a O ttfu Hd Lan, gen A quy dinh h4t tron trQi hoan todn so v6i gen a quy rtinh
hat nh5n Cho hai cay {du hpt tron giao phAn v6i nhau, thu rlugc F1 todi hat trcrn fiay x6c dinh ti lQ phdn li kiOu hinh 6 F2 khi Fr t.u t\u ph6n.
b: cho giao ph6n cdy qud d6, ddi thudn-chring v6i c6y qui vdng, trdn thu6n chring, thu dugc F1 chi c6 mQt lopi ki€u hinh Cho cdy F1 giao ph6n vdi nhau, dugc F2
gdm 300 cdy qui d6, trdn :600 cay qud d6, bau dpc : 300 c6y qu6 d6, dai : 100 cdy
qu6 vdng, trdn : 200.c6'y qui vdng, bAu dgc : 100 cdy qud vdng, ddi.
- HAy cho biOt rlac ili6m di truy0n cria m5i tinh tr4ng.
- p6 ttri5 hp sau phdn ly kiOu hinh v6i ti lQ 1 :1:1, itfti bi5 m9 phdi c6 ki6u gen
nhu th6 ndo?
CAU 9
ngudi ta thu
chfn sdm : 1
O mOt lodi thgc vflt, khi cho hai cdy than cao, chin scnn giao ph6n v6i nhau,
dugc F, phdn li theo ti 16: I cdy thdn cao, chin muQn :2 c6y c6y thdn th6p, chin sdm Cho cdc cdy thdn cao, chfn muQn <r
phgn, nguoi ta thu dugc dcri con g6m ch cdy th6n cao, chfn muQn vd c6 c6y th6n thdp, chn 4u0n Bii5t rang kh6ng xity radQt bi6n- Hfly x6c ilinh ki6u gen cta cdc cdy
b6 mp vd vitit so tI6 lai
CAU 10
Scr dd pha hQ dudi t16y ld sg di truy6n bQnh b4ch t4ng d mQt gia dinh nitit rang gen a gdy bQnh bach tang Gi6 thitit cdc cdthe II3 vd 116 kh6ttg mang alen l{n
t-,) Ll Binh thucrng
O tspch r4ng
a.Xdc dinh ki6u gen cria cdc cdth€ l, 2,4,5,7 vd 8.
b Xdc su6t dC II5 c6 ki6u gen di hqp trl bdng bao nhiOu?
c Ntiu x6y ry su ktit h6n gdn giua IIIT vd IiIs thi x6c su6t AC c1p vg ch6ng ndy
sinh ra ngudi con ddu ldng mdc bQnh bach tang (tinh theo %) li bao nhi6u?
Thi sinh kh6ng srl dsng tdi 1i0u khi ldm bdi Gi6m thf kh6ng gi6i thich gi th6m.
2
than
Frfu
cao,
thu
m