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Question

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 : 1
  2. 3 : 1
  3. 1 : 1 : 1 : 1
  4. 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
Solution
Verified by Toppr

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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