Q. Heterozygous tall plant is selfed. It produces both tall and dwarf plants. This confirms Mendel's

 19  1 Principles of Inheritance and Variation Report Error

Solution:

Heterozygous tall plant possesses two different types of alleles and during gamete formation by meiosis, the alleles of a pair segregate from each other and only one type of allele is passed to each gamete. This confirms Mendel's law of segregation.