* Genetics: Brown fur color in mice is usually dominant. This means that even if a mouse carries the gene for white fur, it will still have brown fur if it also carries the gene for brown fur.
* Recessive Genes: For two brown mice to have a white offspring, both parents would need to be carriers of the recessive white fur gene. This means they would both have one gene for brown fur and one gene for white fur.
* Chance: Even if both parents are carriers, the chances of them both passing on the white fur gene to their offspring are relatively low. It's like flipping a coin – there's a 25% chance of getting two tails in a row.
Therefore, it's very improbable, but not impossible.
Here's a simple analogy: Imagine brown fur as "B" and white fur as "b".
* Parent 1: Bb (brown fur, carries white gene)
* Parent 2: Bb (brown fur, carries white gene)
Possible offspring combinations:
* BB - Brown fur
* Bb - Brown fur
* Bb - Brown fur
* bb - White fur
As you can see, there's a 1 in 4 chance of getting a white offspring (bb).
It's important to note: This explanation assumes a simple genetic model. In reality, fur color in mice can be influenced by multiple genes, making the situation even more complex.