Odd leaves on apple seedling

Made about 70 seedlings last year, openly pollinated, mother an ornamental apple / crab apple. On of the plants have very different leaves, they are somewhat spiky and a lot broader compared to other seedlings and apple trees that I got.

Any wild guesses? What have caused this? Is it going to be a healthy tree only with odd leaves? Could it possibly help me guess how the fruits/tree will turn out? Are there any known apples with this type of leaves?

Picture from earlier this evening.

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Some native crabs (malus fusca, malus ionensis, malus coronaria) have lobed leaves. I have at least one seedling ornamental crab with lobed leaves too.

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