Zoology - Principles of Inheritance and Variation Question with Solution | TestHub

When ${\mathrm{F}}_1$ hybrid is crossed with its recessive parent, it is called test cross. By test cross heterozygosity and homozygosity of the organism can be tested. It gives $1:1$ ratio in monohybrid and $1:1:1:1$ ratio in dihybrid condition. In presence of linkage the ratio varies from this.