trBND rnANn pno THANGLTyEN<br />
PHoNG GrAo_UggJA EAo rAo<br />
<br />
on ciriNH rHtrc<br />
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Ciu<br />
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r(Y THr<br />
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cHgNHec srtlH cr6r Lop s<br />
NnT hgc20t7 - 2018<br />
ivtON: srNH Hoc<br />
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Thdi gian ldm<br />
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bdi:<br />
<br />
150 phrit, kh6ng ke<br />
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thdi gian giao d€<br />
<br />
I (4,0 di€m)<br />
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a) Hdy ttritit<br />
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thf nghiQm dO chrmg minh thdnh phAn h6a hgc cria xuong.<br />
p) Ciai thich nguydn nhdn hiQn tucrng "chuQt rft" khi choi the thao.<br />
Ciu 2 (4,0 di€m)<br />
a)<br />
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tct5<br />
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Axit nuclCic dugc t6ng hqp theo nhtng nguyOn tfc ndo?<br />
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b) MOt gen nhdn d6i m6t sO Oqt. Trong t6ng sO gen dugc sinh ra thdy c6 14<br />
magh don d6u chria c6c nucl66tit tu do m6i t*Ong<br />
6'ao cung c6p. Mach rlcrn thir<br />
nh6t cua gen ban dAu c6 A : 225 vd G : 37 5, *p-.h"Oi<br />
irtt nui<br />
g; d6 c6 A : 300<br />
vd G: 600. Tinh s6 nucl66tit timg loai m6i trucrng cung c6p "d<br />
cho qud trinh nh6n d6i<br />
cria gen n6i tr6n?<br />
Cffu 3 (4,0 di€m)<br />
O mQt lodi ct6ng vflt, c6 z t|bin sinh tnmg c6 ki6u gen AabbDd ti6n hdnh gi6m<br />
binh thucm9 t?o giag tu. Sti lopi trung thgc tC c6 th6 c6 ld bao nhi6u? Hey"vi€t<br />
11,""<br />
ki6u gen tuong img v6i sO lopi trung thgc tdn6itr6n.<br />
<br />
Ciu 4 (4,0 di€m)<br />
cing trfmg vd d6ng sinh kh6c tnmg.<br />
b) Tpi sao o c!c.2eV giao phdn, ngudi ta lir6n henh tr,r thp ph6n bit buQc li6n<br />
ti€p qu.a nhi6u the he thdy xhy ra-hiQntqOg tho6i ho6 gi6ng, trong khi d cdc'cdy tg<br />
thr,r ph6n kh6 nghiCm ng{t khi tg thu ph6n mrong d6n d6n trroai hoi gi6ng?<br />
c) cho thc ne Pe c6 4 cdy,trgng