A cross between a dominant phenotype with the recessive parent in order to check its genotype is called

Due to the non-disjunction of chromosomes during spermatogenesis, sperms carry both sex chromosomes (22A + XY) and some sperms do not carry any sex chromosome (22A + O). If these sperms fertilize normal eggs (22A + X), what type of genetic disorders appear among the offspring?

The main aim of human genome project is

Test cross is a cross between 

The phenotypic ratio in plant Snapdragon in F2 is