Here's why:

* Cloning involves copying the genetic material (DNA) of one organism. This DNA is then used to create a new organism.

* Since the new organism's DNA is an exact copy of the original, they have the same genes. This means they share the same genetic blueprint, leading to identical traits.

However, it's important to note that while clones share the same genetic makeup, they may not be completely identical in all aspects.

* Environmental factors can influence development and phenotype. For example, two cloned animals raised in different environments might develop slight variations in physical characteristics due to factors like nutrition or exposure to different stimuli.

* Epigenetics plays a role. This refers to modifications to DNA that don't alter the underlying sequence but can affect gene expression. Clones might have subtle differences in epigenetic markers, which could influence some traits.

Overall, cloning creates organisms that are genetically identical, but environmental and epigenetic factors can lead to minor variations.