question_answer

The term test cross refers to a cross between :

A)  \[{{F}_{1}}\] hybird with another \[{{F}_{1}}\]hybrid

B)  \[{{F}_{1}}\]hybrid and a double recessive individual

C)  \[{{F}_{1}}\]hybrid and either of the parents

D)  \[{{F}_{1}}\]hybrid and \[{{F}_{2}}\]individual

Correct Answer: B

Solution :

                When F1 hybrid is crossed with its recessive parent, it is called test cross. e.g., when we cross a F, heterozygous hybrid tall plant (Tt) with their pure recessive dwarf parent plant (tt). Results: 50% are heterozygous tall while 50% are homozygous dwarf.