Which alleles could the offspring inherit from
parent 1?

The purpose of Mendel’s dihybrid cross experiment was to find out if one trait can affect the inheritance of other traits.

Option D

Explanation:

In every living organism there are innumerable characters and each of those character is regulated by alleles. Alleles are basically a form of gene.  Mendel carried out dihybrid cross experiment  in order to understand whether or not a pair of allele affects the inheritance of another pair of alleles. Mendel conducted this experiment by using three steps: Firstly he selected parents and obtained the pure lines. His next step was Emasculation , Dusting and Raising F1 Generation, and lastly he inbreed-ed F1 hybrids so that it can produce F2 generation. And his experiment turned out to be a success.