What genotype a pure breeding short haired guinea pig have?

Here's why:

* Short hair is recessive: This means that the guinea pig needs two copies of the recessive allele (h) to express the short hair trait.

* Pure breeding: This means the guinea pig has received the same allele from both parents, ensuring a homozygous genotype.

So, a pure breeding short-haired guinea pig is homozygous recessive for the hair length trait.