The characteristics of a field mouse are definitely inherited from its parents. A young mouse will gain all of its characteristics from it's parents because they are a product of their parents.
It's brown fur
Brown fur
i would say its fur color, tail length, and ear size ( if any are correct its fur color)
Yes
It's brown fur
If its in the field, its not a house mouse.
A field mouse and a house mouse are both the same thing, except the field mouse lives in the field and the house mouse lives in homes. Their scientific name is mus musculus.
characteristic of computer mouse
Ural Field Mouse was created in 1811.
The Esperanto words for field mouse and computer mouse are kampo muso and komputila muso.
I am not certain how old is a 'baby' field mouse. They like greens and can forage. A nursling would likely not survive without its mother. You could feed a nursling with a dropper and some baby food, perhaps.