Answer:
TTppRR will produce TpR gametes. ttPPrr will produce tPr gametes.
Explanation:
Let us assume:
Normal tail : T, Tail less : t, Pale skin : P, Dark skin : p, Smooth skin : R, Rough skin : r
A pure-bred normal tail, dark skin, smooth skin mouse and a pure-bred mouse that is tail-less, pale skin, and rough skin crossed together then,
TTppRR x ttPPrr
One allele from every gene comes in a gamete thus, TTppRR will produce TpR gametes. ttPPrr will produce tPr gametes.