Certified GKH Gardening Expert
Meyer Lemons can self pollinate, and will be true to seed. It will likely look pretty similar to the parent, unless it was near another citrus that could have pollinated this.
Now, the reason that your tree is dwarved is because of the root stock that it is grafted to. The seedling from the fruit will not be a dwarf, since it will have its own roots, but will take the characteristics of the parent otherwise.
This article will give you more information on Meyer Lemon: https://www.gardeningknowhow.com/edible/fruits/lemons/growing-meyer-lemons.htm