Yes. It is forbidden to create a hybrid fruit by grafting a tree of one species onto stock of another; but the resulting fruit is permitted, and certainly trees propagated from cuttings of the grafted tree, or from seeds of its fruit, are permitted. Hybridising in the lab, by means of gene grafting, is permitted.
While the broccoflower is a recent hybrid, it is still a vegetable. As a fruit of the field and one that is not genetically altered, it is just as kosher as yellow corn...which is also a hybrid. Naturally bred vegetables, even if cross pollinated by hand, are kosher to eat. If they breed true to the cross breed, ie hybrid, they are considered kosher.
There is no non-kosher fruit.
In any supermarket, look for canned fruit with a kosher certification on the label.
Not all of them are kosher. It will say on the box.
Kelloggs fruit snacks
Yes, there are no restrictions on fruit for Passover.
Certainly.
Usually, provided that it contains nothing but fruit and sugar. If it contains grape juice, carmine, or gelatin it's probably not kosher.
Grapes, as a fruit, are kosher. However, grape products have additional rules specific to grapes due to the religious significance of the fruit.
Yes, as plantains are a fruit.
Yes, however, depending of level of kashrut observance, some fruits are avoided due to the difficulty in making sure there are no bugs/contaminants in the fruit. One of the best known examples of such a fruit are raspberries.
An atemoya is a hybrid fruit, a cross between a cherimoya and a sweetsop, or the tree which bears this fruit.