"Biploidy" is not a recognized scientific term in biology or genetics. It's likely a misunderstanding or a mishearing of a related term.

Here are some terms you might have been thinking of:

* Diploidy: This is the normal state of having two sets of chromosomes in each cell. Most animals and plants are diploid, with one set of chromosomes inherited from each parent.

* Polyploidy: This refers to having more than two sets of chromosomes in each cell. This can occur naturally or be induced in plants for agricultural purposes.

* Bipolar: This term is used in medicine to describe a disorder characterized by extreme shifts in mood, energy, and activity levels.

If you could provide more context or the source of the term "biploidy," I might be able to give you a more accurate answer.