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Oh gosh that's hideous !The fruit is not identified in Genesis.
So.e think the tree and forbidden fruit passage is a metaphor,idiom,allegory,as you wish, for a forbidden behavior or activity.
Namely that which would be known as the heretical Serpent Seed Doctrine.
Which in itself explains why innocence was lost in both Adam and Eve and shame in their own nakedness ensued.
Because the forbidden tree in some SSD discussions is a reference to the angelic origin and sexual organ of Lucifer, the most beautiful of Gods angels, who was in the garden. Not actually a snake in a tree. Though snake, serpentine energy, is also a reference to sensual arousal and orgasm.
In short,the Serpent Seed Doctrine,SSD, proposed that both Eve and then Adam partook of sexual relations with Lucifer.
Which later resulted in her becoming impregnated with twins. One , Abel, whose father was Adam. The other, Cain, was Lucifers.
This being a biological reproductive act known as heteropaternal superfecundation.