Blood of the Westernesse
 

How does the blood of the Westernesse pass down in generations? I just read that Faramir has more of this blood than Boromir. How does the younger have more than the elder?

i think they just ment he acted more like a westernesse than Boromir

No I think it's possible, it would really mean that his DNA would be closer to the DNA of the Numenoriens.

The Dark Elf, you are rather mistaken. The term "Westernesse" refers to the island of Numenor itself, not to the people who lived there.

Look at it this way, sometimes genetic traits skip generations or siblings. For example, if your father has black hair and your mother has blond hair, you can have black hair and your sibling can have blond hair, but still be your sibling. The inheritance of the "Blood of Westernesse" works the same way. By the time of the Third Age, it was so diluted, especially in Gondor, that it probably skipped generations and siblings like crazy. Denethor had it, but he used it to look into others' minds and judge them harshly. Faramir had it, but he used it to understand others, not judge them. Unfortunately, Denethor loved Boromir more, and the fact that Faramir was that much more "powerful" than his brother probably contributed to the bitterness with which Denethor treated Faramir.