Which type of estate represents a shared ownership with rights of survivorship?

The type of estate that represents shared ownership with rights of survivorship is indeed Joint Tenancy. In a Joint Tenancy arrangement, two or more individuals hold title to a property together, and each tenant has an equal share. A critical feature of a Joint Tenancy is the right of survivorship, which means that if one joint tenant passes away, their share automatically transfers to the surviving joint tenants. This contrasts with other forms of ownership, where the deceased owner's share might go to their heirs according to a will or state law.

Understanding this concept is crucial, as it affects how property is transferred upon death and how owners can make decisions about the property. It's important to note that for a Joint Tenancy to exist, the four unities must be present: unity of time, title, interest, and possession. This ensures that all joint tenants have the same rights and interests in the property simultaneously.