Answer:
This question lacks options, the options are:
A. He tested non-dominant traits.
B. He performed dihybrid crosses.
C. He made an F3 generation.
D. He tested one trait at a time.
The answer is B
Step-by-step explanation:
Gregor Mendel, who is referred to as the FATHER of GENETICS, discovered the principles that governs inheritance till date. In one of his principles which he called LAW OF INDEPENDENT ASSORTMENT, he stated that the separation of one allele of a gene into gametes does not influence the separation of the allele of another gene i.e alleles of genes segregate independently of one another.
In order to test this principle, Mendel performed a DIHYBRID CROSS, which is a cross where the inheritance of two different traits encoded by two different genes are simultaneously studied. For example, he studied the gene for seed shape (round or wrinkled) and seed color (yellow or green) in pea plants. By performing this DIHYBRID CROSS, he was able to test his idea that pattern of the inheritance for one trait (seed shape) did not affect the pattern of inheritance for another (seed color).