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
MmEeMmEEMMEeMMEE
MmeeMmEeMMeeMMEe
mmEemmEEMmEeMmEE
mememmEeMmeeMmeE
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
XYXX
XYXXdD
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)
nnNn
NnNNN n
n
N¾ (75%) negres
¼ (25%) blanques
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Tallo alto (AA)
Tallo enano (aa)
F1
AaAa
AaAa
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
aaAa
AaAA
A
A
a
a
El 75% del fenotipo seran de tallo alto y el 25% seran de tallo enano