Báo cáo sáng kiến Một số kinh nghiệm trong công tác bồi dưỡng học sinh giỏi môn sinh học 9

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2
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6 6WLNhiễm sắc thể, ADN, lai một và hai cặp tính trạngN.9
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3 /LMở rộng và nâng cao kiến thức
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tạo nguồnN
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dạy hay do nội dung không được đầu tư đúng mức hay do việc tuyển chọn đội
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hChọn học sinhbồi dưỡng%!G#F.''*8 4
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M>9X !3* '!wm'* (G'&
'*5*0 !"#$%&''()
Dg
4

hChọn tài liệu, nội dung bồi dưỡng: D$' $6 %! '.#K
EG9p35 + Q* .!/5!/# E9 4J
#,! F3)M@>=!a6 #9R9 +F
'*G3, ?(!3W '*8=!
' L*+$N.*  $ G#. /9 < VV e
q5 $ +6 !/.PC#p ) #=!+A
/9 0 !1(
{Lập kế hoạch bồi dưỡng: !I`MG A3#P9f3
%W3%-  ) 6  4[gx ,  G (
+ Cung cấp kiến thức: % +693, ?G9#,
0!'3, ?9R9. 4U,35. 4J,9? /9(6=3T
3EI5J5|6=3}5G~P55•.6FU0*G=I6i62<631kz
G5 P693, ?1'* 0 A}S3T
9 -.** I96W. -6) =!
3, ?()# E9E#, &/.pE9
E(D$# E9K&9'*5 A!G?JG
& !G9 W'**!5 GF  ! !
*~!H(M/ F&9'*3, ?J(q3,
?693 A=W'*u' 

J +-3.G*KF G)3, ?
*3!(
{Hướng dẫn học sinh làm bài: $76 %! '
GgA 0 ,9/#123 P#8%!5.#K
#7K38,3, % =!V(V .G
{'*3EW G 4F ,!9& P'W.a
pGW#.ap/+#.)oP&GW
#.P .35*!. E9 #(
WGf'*3#!999)
A!*!9f(
+ Kiểm tra kiến thức: !/76 %! ' % +#1
2'*8.#Kv, !b/33P ! + !*v3 P
#, *0 ,9 3, ?=!'*/ ,?F(D$& 3
$*!H#3P ! E *06  , . 4& 3$
'*5 PE!+Q,K9P5 P3o9(P 0
$3G5 PC#p# E9 V/W K
' V 0.5%p A!#.56
P.53V K,V# ) .,V#!
)  + !3G%K bGFGV)oJ*!(
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!(@ !R53PV;

’.E! ~;

 4ˆ’ 4#)5
ˆ53PV;
O
;

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O
’
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;
O
;

;
O
’

]
;
O
.;

;
O
.’

•
s
i;
O
;
O
;

’;
O
’;
O
;

iMk#+ AsR
#(@R.3PV;

;

? 8#)ˆW /!! ~;

(
qGi=!#);

’(@ !#+ A5i;
O
’? 8ˆ /!
! ~;
O
*!ˆ5i;

O
;

>J1!]ˆ#+ Aa#)R
;
O
;

;

’
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15


]
;
O
.;

;

.’
•
s
i;
O
;

;


’;
O
’;

;

iM~!#+ A~!R
~! !#+ A~! !R
\(?! !R5i;

’Gˆ /! ~;

(
DEˆ3R;
O
;

.#)3R;
O
’
>J1!]ˆ#+ Aa#)#+ A
;
O
;

;
O
’


]
;
O
.;

;
O
.’
•
s
i;
O
;
O
;

’;
O
’;
O
;

iM\#+ Ats !Rts !3R
DE3R5 c;
O
;
O
.;
O
;


aa6 wlƒ
gq,3R;
O
;
O
613R;
O
’
>J1!]ˆ#+ Aa#)#+ A
;
O
;
O
;
O
’

]
;
O
;
O
.’
•
s
i;
O
;
O

;
O
’
iM6 W3R
gq,3R;
O
;

613R;
O
’
>J1!]ˆ#+ Aa#)#+ A
;
O
;

;
O
’

]
;
O
.;

;
O
.’
•
s

i;
O
;
O
;

’;
O
’;
O
;

iMk#+ AsR
DE?!5 P*R,!i;
O
;

aa6 P
?!Ra6 $wlƒa\wƒ„s\.wƒ

Chuyên đề 2:
Y @‚f@)YZ#a(
Cp Y @)YZ#a( f!Z)
!ƒ"y
1/ Đặc điểm của phân bào nguyên nhiễm@
•J66TL+ ?9! ,# 5 4s ,#ˆ
! \ ,#5#FU*o P) ,#ˆ(
>J1
q> 0 `ˆ9!
s ,#ˆ\LJNggggggggggggggggggg”s ,#\L3d9Nggggggggggggggggggg”\ ,#\

]Y`
$z>) ,# /!*!3G9
g 4s ,#ˆ#!\
3
„”4a ,#ˆ#!a(\
3

LiOH ,#ˆWG93N
Rz>) ,# / G*!3G9
g 4s ,#ˆ#!\
3
‰s„”4a ,#ˆ#!aL\
3
gsN
LiOH ,#ˆWG93N
Dg
16

XzI*)U*o PJ5  ,# / 
g 4s ,#ˆ#!\(\
3
„”
4a ,#ˆ#!a(\(\
3

LiOH ,#ˆWG93N
•zI*) F  ,# /!*!3G9
g 4s ,#ˆ#!\(\
3
„”4a ,#ˆ#!a(\(\

3

LiOH ,#ˆWG93N
•zI*) F  ,# / G*!3G9
g 4s ,#ˆ#!\(L\
3
gsN„”4a ,#ˆ#!a(\(L\
3
‰sN
LiOH ,#ˆWG93N
‘zI*)U*o PJ JJ AF#9
69
g s ,#ˆG93\(L\
3
‰sN
g a ,#ˆWG93a(\(L\
3
‰sN
ozI*)U*o PJ  AF#9
69
g s ,#ˆG93\(L\
3
‰\N
g a ,#ˆWG93a(\(L\
3
‰\N
qzI*)U*o P 0 3G9
g 4s ,#ˆ#!\(L\
3
gsN„”4a ,#ˆ#!a(\(L\

3
g
sN
LiOH ,#ˆWG93N
zI*)  J*oa6 $ 3G
g 4s ,#ˆ#!L\
3
gsN„”4a ,#ˆ#!a(L\
3
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a- D,  + 0q G/J ?\=!/y^q
b- ;p + 0q G/J ?\0! GG oŒ
6i6*lD,  + 0V   G/\
•>J1
Dg
20

O/s yg g g g ;g g yg g 
O/\ g ;g ;g yg g ;g g yg ;
#NqG oap + 0q G/\^0!G o#I*
!q)$! G\/Jy^qy„.„;
_RTính số lượng và thành phần các loại nucleotit trong phân tử ADN
3:56a],\!+.*5j9zf'. '.4 '. 'qNmov2"
\],\)
; %+.*5j9zf'. '.4 'C.'
; \".HL2.4 '. '7qlmm)mmmFQ%".HL2f'. '
.4 'C.'
6i6
!N b$9 H/V  
VG o#I* !5ƒy„ƒ„\lƒq
ƒ„ƒ;„
sllƒg\(\lƒ
„klƒq
2
#N >)qH/
g !5;„kll(lll„klƒq I*)V  =!y^qLqN
I*)q=!y^q

q„
kll(lll(sll
„s(lll(lll
30
g DE*)qH!=!y^qA = T = 20% x 1.000.000 = 200.000;
 G = X = 300.000
CXTìm tổng số nucleotit, chiều dài và khối lượng của phân tử ADN
3:0 ],\!]qNMmq?mov2".4 '0 ],\)
a- Fv2.4 '0 ],\I
b- %'D-'0 ],\)
c- = ],\9$!'.HL256a  '$I
6i6
!N I*)V  =!/y^qLqN!5y„\[l„slƒq
>!I*)V  =!/y^q
q„
\[l(sll
„\[ll
sl
#N @W=!/y^qL_
y^q
N!5
_
yq^
„
q
(k.[y

\
„
\[ll

(k.[y

„[lnly

2
N Khối lượng phân tử của đoạn ADN (M
ADN
)
Ta có: M
ADN
= N . 300 ((@„\[ll(kll((@„m\l(lll((@
_•VL,E.IŒ34jG—6‡,EIŒ5KGN…53SK8*;<,E05.ŒK363
L—638NgI50I5rkz
3:0 ],\!qOmm7qpmm)E'0 ],\0!#60'l.jQ
`0@T0 ],\ 0HL 9
Dg
21

T.4 'f'. ''9HU20Q285 9F60'
0 ],\0Q I

a) >)/y^q /!
V , ./y^qu 0k
!5>)/y^q /! \

„\
n
„n
b) >)V  H/ A69
g>)V  H/=!y^q#! y„„nllt„;„mll

g>)V  H/ A969/y^q#!
0k
y
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
„y
y^q
„L\

‰sN„nllL\
k
‰sN„wxll

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„;

„
y^q
„L\
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‰sN„mllL\
k
‰sN„[Xll
9$06 :"$09 25jD'9-'0QH&2D{(
"'2'e'.&5k#'*)w'*56. 'D2-'/5-9 29F
H&2D{2'B'-'/5'8/YR|z22'B'-'
/5- R04.'"#Y2}"$9 2(/5)
=3U0i2M6>NOIP5,6I6Q6mLP5Rn$npRn$$
z!9F *)99G G3, %/  '

\lslg\lss*!
g F P'*8>9XAM@>])_/ s
+\kk3,3-L69$N
gF P'*8>=!$`o/ s+
k#!.w3,3-L69 bN
Dg
22
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\( 0'. 03P ! VC3, ?.3Tg\7>=
k( }S$3T# E9 0E o$g\7>S' DK(
[( ` E9>'''g(>Djz)MPg\7>S' 2/B'(
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x( ` E9!>'Xg\7>=wS-51%3'
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