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Why couldn't Mendel's dihybrid cross results (independent recombination of R and Y) be explained if a germ-cell inherited a single whole gene set unchanged from one parent? independently

Question
Why couldn't Mendel's dihybrid cross results (independent recombination of R and Y) be explained if a germ-cell inherited a single whole gene set unchanged from one parent? independently
Because then 'R' and 'y' would remain linked together and could not be inherited
Because then no seeds would form at all
Because then all F1 offspring would be sterile
Because this scenario has nothing to do with gene sets
Answer
Because then 'R' and 'y' would remain linked together and could not be inherited
Detailed Explanation
If a germ-cell simply passed on a whole, unbroken gene set from one parent, traits like R and y would stay linked together, contradicting the independent assortment seen in the dihybrid results.
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