[Elsie]

We humans are at the halfway point, or just slightly past it, in terms of the possible complexity of DNA.

Says who(m)?

[alexander_busek]

Says who(m)?

Someone missed that day of 5th-grade English, when this was explained!

To ask, "Says whom?" would be completely ungrammatical.

Whom is the Dative or Accusative form of who. (Whose is the Possessive form.)

After all, you wouldn't ask "Says him?", would you?

Regards,