Question

In dihybrid cross, which of the following can be the genotypes of the plants that could be taken for dihybrid test cross?
[0.7 mark]

• A. $AABb\times aabb$
• B. $AaBb\times AaBb$
• C. $AaBB\times \times AaBb$
• D. $AABB\times Aabb$

Answer 1

The correct option is A $AABb\times aabb$

In a typical test cross, an organism is crossed with the recessive individual instead of self-pollination. The individual with dominant phenotype can be homozygous or heterozygous. In the dihybrid cross, AABb shows dominant phenotypes and aabb shows recessive phenotypes. Therefore, this cross is test cross.