Final answer:
The word 'McClintock's' in the sentence is a possessive noun. It shows ownership or possession.
Step-by-step explanation:
The word 'McClintock's' in the sentence is a possessive noun. Possessive nouns are used to show ownership or possession. In this case, 'McClintock's' shows that the name belongs to Barbara McClintock among the Nobel Prize winners. The apostrophe s ('s) indicates possession.
Learn more about Possessive nouns