A) 3 : 1
B) 1 : 1
C) 1 : 2 : 1
D) 9 : 3 : 3 : 1
Correct Answer: B
Solution :
The cross of heterozygous dominant with its recessive parent is called test cross. The test cross gives 1 : 1 ratio in monohybrid condition whereas 1 : 1 : 1: 1 in dihybrid condition. In a monohybrid cross when a homozygous dominant plant is crossed with homozygous recessive plant the \[{{F}_{1}}\] plants are all. heterozygous dominant. On selfing of the P, plants in \[{{F}_{1}}\] generation show 3 : 1 phenotypic ratio whereas 1 : 2 : 1 genotypic ratio. In a dihybrid cross when a homozygous dominant plant (for two traits) is crossed with homozygous recessive plant (for two traits), the \[{{F}_{1}}\] plants are heterozygous and dominant whereas, show 9 : 3 : 3 : 1 phenotypic ratio in \[{{F}_{1}}\] generation.
You need to login to perform this action.
You will be redirected in
3 sec
