If a female plant of genetic constitution AABB is crossed to a male plant of genetic constitution aabb and the F1 is test crossed, the genetic constitution of the test crossed progenies will be

Answer: Option D

If a female plant of genetic constitution AABB is crossed to a male plant of genetic constitution aabb and the F₁ is test crossed, the genetic constitution of the test crossed progenies will be 1AaBb : 1Aabb : 1aaBb : 1aabb.
Under the law of dominance in genetics, an individual expressing a dominant phenotype could contain either two copies of the dominant allele (homozygous dominant) or one copy of each dominant and recessive allele (heterozygous dominant). By performing a test cross, one can determine whether the individual is heterozygous or homozygous dominant.
The test cross ratio obtained by crossing AABB X aabb will be 1 : 1 : 1 : 1.