exercicis genetica
TRANSCRIPT
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Rata domèstica 1
Pelatge blanc (mm)
Bigoti espars (EE)
Rata domèstica 2
Pelatge marró (MM)
Bigoti espes (ee)
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Rata 1 Rata 2
MMeemmEE
mEmE
mE mEMe
MeMeMe
X
MemE
MEMe mE
me
MmeE Mmee mmEe meme
MmEE MmEe mmEE mmEe
MMEe MMee MmEe Mmee
MMEE MMEe MmEE MmEe
me
me
mE
mE
Me
Me
ME
ME
Marró bigoti espars 9/16
Marró bigoti espes 3/16
Blanc bigoti espars 3/16
Blanc bigoti espes 1/16
4/16 homozigots
12/16 heterozigots
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Home daltònic XYd
Dona portadora XXd D
XX XY
XX XY
dD
dd d
D
X Y
XD
X
d
d
2/8 Dona portadora2/8 Dona daltónica2/8 Home no daltónic2/8 Home daltónic
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Flores rojas X Flores blancas
CR C
B
100% Rosa
100% Heterocigótico
F1
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F2
X
25% Rojas
25% Blancas
50% Rosas
50% Homocigoto
50% Heterocigoto
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216 Moscas negras (75%)
72 Blanques (25%)
N > n Negres (NN)
Blanques (nn)
NN Nn
Nn nn
N n
n
N¾ (75%) negres
¼ (25%) blanques
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Tallo alto (AA)
Tallo enano (aa)
F1
Aa Aa
Aa Aa
A A
a
a
El fenotipo sera 4/4 (100%) seran de tallo alto
El genotipo sera Aa (100%)
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F2
Aa X Aa
AA Aa
Aa aa
A
A
a
a
El 75% del fenotipo seran de tallo alto y el 25% seran de tallo enano