Crossing over that results in genetic recombination in higher organisms occurs between

Describe test cross. why it is necessary ?

Haemophilia is a

When a diploid female plant is crossed with a tetraploid male, the ploidy of endosperm cells in the resulting seed is

Linked gene are separated by

All the sons are haemophilic and daughter are normal of a haemophilic father and normal mother. This character is