Answer:
The correct answer would be - the ratio of phenotypes in an organism cross will tell if the genes are linked or not.
Explanation:
In this question, we perform a test cross with a fruit fly that is heterozygous If we perform a test cross between two parents with identical heterozygous genomes AaBb.
If there is no recombination found in the offspring of this cross it means there are no linkage of genes present. And if there are new or recombinant phenotypes present it means that there are genes linked together.
