question_answer

The ratio 1 1 1 1 is expected as a result of

A)  monohybrid cross

B)  monohybrid back cross

C)  dihybrid cross

D)  dihybrid test cross.

Correct Answer: D

Solution :

: Dihybrid test cross is obtained when dihybrid\[{{F}_{1}}\]plant is crossed with its recessive parent considering in two characters. By this cross the heterozygocity and homozygocity of the organisms can be tested. Then, dihybrid test cross ratio is\[1:1:1:1\]. Likewise, monohybrid and trihybrid test cross ratio are\[1:1\]and\[1:1:1:1:1:1:1:1\]respectively.