“Clones are people two” (or “Clones are people 2”)—instead of “too”—is a jocular saying that has been printed on many images. “THE XEROX LAW OF ORGANISM DUPLICITY—Clones are people, two” was printed in the Des Moines (IA) Sunday Register on October 5, 1980. “The quip of physicist Arlen Zander may elucidate further: ‘Clones are people two’” was printed in the Dallas (TX) Morning News on May 24, 1981.
   
“CLONES R people 2” was printed in the LA Weekly (Los Angeles, CA) on December 10-16, 1982. “REMEMBER: CLONES ARE PEOPLE 2” was posted on the newsgroup alt.punk on August 27, 1999.
           
       
Wikipedia: Human cloning 
Human cloning is the creation of a genetically identical copy (or clone) of a human. The term is generally used to refer to artificial human cloning, which is the reproduction of human cells and tissue. It does not refer to the natural conception and delivery of identical twins. The possibility of human cloning has raised controversies. These ethical concerns have prompted several nations to pass laws regarding human cloning and its legality.
     
Newspapers.com
5 October 1980, Des Moines (IA) Sunday Register, “Never volunteer to fry bacon in a nudist colony” by John Karras, pg. 8H, col. 2:
“THE XEROX LAW OF ORGANISM DUPLICITY—Clones are people, two.” 
     
24 May 1981, Dallas (TX) Morning News, “A Few Words” by Dr. Laurence McNamee and Kent Biffle, pg. 6G, col. 1:
The quip of physicist Arlen Zander may elucidate further: “Clones are people two.”
 
Newspapers.com
10-16 December 1982, LA Weekly (Los Angeles, CA), pg. 81, col. 1 ad:
CLONES R people 2
(Clones, a private club for women.—ed.) 
 
Newspapers.com
7 November 1983, The Post-Crescent (Appleton, WI), “Today’s Chuckle,” pg. A-7, col. 4:
Reminder to biologists: clones are people two. (Copyright 1983)
   
Google Books
A Few Words
By Laurence F. McNamee and Kent Biffle
Dallas, TX: Taylor Publishing Company
1988
Pg. 88:
The quip of physicist Arlen Zander may elucidate further: “Clones are people two.”
       
Google Groups: aus.tv.x-files
Clones are people two
Antti
7/24/96
By all accounts a classic episode.
   
Google Groups: alt.punk
NEWS-SOME FUNNY QUOTES IN HERE
Die Zeit 7
8/27/99
(...)
REMEMBER: CLONES ARE PEOPLE 2
 
Twitter
Twila Marie
@twila_zoned
Clones are people two.
11:05 PM · May 22, 2007·Twitter Web Client
   
Twitter
Jace of Fuse!
@JaceFuse
Written on wall in doctor’s office: Clones are people two.
11:49 AM · Sep 12, 2007·Twitter SMS
 
Twitter
Rehan Jalali
@SixPackDietPlan
Clones are people 2
5:20 PM · May 19, 2009·Twitter Web Client
   
Twitter
IndyGeek
@IndyGeek
Funny bumper sticker: Clones are people too
Funnier bumper sticker: Clones are people 2
9:09 AM · Jul 6, 2010·Echofon
 
Reddit—Oneliners
Posted by u/silverbonez January 15, 2020
Clones are people two.
 
Twitter
Marisa!
@mindofmarisa
Just remember guys, clones are people two
4:48 PM · Jan 15, 2020·Twitter for iPhone