My grandfather owned a one-acre plot of land that he divided equally between his two sons using a partition deed. Now, he wants to transfer this property to just one son and his daughter. Can we, his other grandchildren, claim a share in the land based on the original partition deed?

No, you cannot claim a share in the land based on the original partition deed. The partition deed divided the land equally between your father and his brother. Your grandfather has the right to dispose of his property as he wishes, and the original partition deed does not affect the subsequent transfer.