Taxable income in family matters

If Father invests his money in sons name from years and years cycling and the interest earned is taxed (TDS) and the same is reposted in sons 26AS, hence ITR is filed in sons name. Isthis correct? I guess in family the person who invests mney, if any interest income is generated from it, the income gets added to the total income of the person who gives the money. Please clarify.