STUMPERS CLXV

Credit: NY Times Crossword
May 5, 2005
Chris Sallade

"Unique" means one of a kind. How can something that's unique be shared, as it is by the three phrases below?

SECOND NATURE
HOUSEHOLD NAME
UNITED NATIONS

HINT:
Spliced genes

Answer:

Everyone's DNA is unique:

seconD NAture
householD NAme
UniteD NAtions