Final answer:
In a Joint Tenancy with Right of Survivorship (JTWROS) account with $100,000, each individual has an equal and undivided right to the entire amount, and full ownership passes to the survivor upon the death of the other.
Step-by-step explanation:
The ownership of assets in a Joint Tenancy with Right of Survivorship (JTWROS) account is shared equally between the parties. If two individuals hold $100,000 in a JTWROS account, each party has an undivided right to the entire $100,000, rather than a divided 50% interest. This means that upon the death of one party, the surviving party acquires full ownership of the account's assets.