Has the landlord studied genes? If you haven't learned it, I'll talk about it briefly.

The principle of grafting is that persimmon branches only absorb the nutrition of black dates, that is, asexual reproduction. Persimmon branches only get nutrients and water from black dates, which only provide nutrients and water to persimmon branches, but the cells and genes of black dates are not passed on to persimmon branches.

When persimmon branches with nutrition and water are propagated (that is, the results), because there is no gene of black dates but only the nutrition of black dates, the fruits it bears are persimmons, that is, persimmons are produced.

If the landlord still doesn't understand, give another metaphorical example, that is, persimmon branches are parasitic on black dates. For example, the black jujube branch is a person, and the persimmon branch is a bug in that person's stomach, so the bug is a bug after absorbing human nutrition, not a child. Understand?

If it is a fruit with half persimmon and half black date, it is not a problem of asexual reproduction but a problem of plant cell fusion, which the landlord will learn in the second year of high school.

Grafting is simply asexual reproduction, and what fruit grows depends on the grafted branches. Of course, if only one branch of black jujube is grafted with persimmon, and there are other branches, it means that persimmon will bear fruit on a tree, and the remaining black jujube branches will still bear black dates, that is, a tree will grow two kinds of fruits. But if you just say persimmon branches, it must be persimmons.

I hope the landlord will study hard and achieve something. ...