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Punnett square of the dihybrid cross shown in Figure 3.8. There are two combinations of dominant and

Description
Punnett square of the dihybrid cross shown in Figure 3.8. There are two combinations of dominant and recessive traits that can result in double heterozygotes in the F1 plants. One (left) involves plants with smooth yellow peas crossed to plants with wrinkled green peas. The other (right) is a cross between plants with wrinkled yellow peas and plants with smooth green peas.


P‘ cross P‘ cross
r—’%
ssvy " , ssyy 9 55w 3 - 0
Smooth Yellow X wrinkled green wrinkled Yellow X Smooth green
Gamete Gamete
formation formation
SY SY
Fertilization @ Fertilization a
F. = Smooth Yellow
F‘cross SsVy X 5st
sY @
SsYY $st
Smooth Smooth
Yellow Yellow
0 F2
G
Sst Ssyy e
Smooth Smooth n
Yellow green 9
,V . , _, K r
a
o) ,9 t
ssYY ssVy i
wrinkled wrinkled 0
Yellow Yellow n
Q Sst Ssyy sst ssyy
Smooth Smooth wrinkled wrinkled
Yellow green Yellow green
V
F; Genotypic ratios F2 Phenotypic ratios
'IIE SSVY
2
[‘6 SSVy 9/.5 Smooth Yellow
2I15 SsYY
‘lis Sst
I
[‘5 SSyy :— 3/I55mooth green
1/15 Ssyy
.
"5 ”W :— 3/1swrinkledYellow
1/15 ssVy
‘lis SSyy — ‘liawrinkled green
oesngags Lsam'ng. All Highls fieoerved.
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