Tall red flowered Pea plant crossed to dwarf white flowered plant yields only tall red flowered plants. A test cross shall give a ratio of
1 : 1
3 : 1
1 : 1 : 1 : 1
1 : 2 : 4 : 6 : 4 : 2 : 1
A
1 : 1
B
1 : 1 : 1 : 1
C
3 : 1
D
1 : 2 : 4 : 6 : 4 : 2 : 1
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Solution
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An heterozygous
tall red flowered plant(TtRr) is crossed with dwarf white flowered plant(ttrr).
In the next generation are obtained.
The ratio is 1:1:1:1. It is a dihybrid test cross.
So,
the correct option is ‘1:1:1:1’.
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