The Y Chromosome... 

People born before 1946 are called -

The Greatest Generation .

People born between 1946 and 1964 are called -

The Baby Boomers . 

People born between 1965 and 1979 are called -

Generation X.

And people born between 1980 and 2010 are called -

Generation Y .

Why do we call the last group -Generation Y ?

Y should I get a job?

Y should I leave home and find my own place?

Y should I get a car when I can borrow yours?

Y should I clean my room?

Y should I wash and iron my own clothes?

Y should I buy any food?

But perhaps a cartoonist explained

it most eloquently below...

Just thought you might want to know "Y "- - - -