It's hard to tell. She was the last dog added to the nine-dog team of Francois and Perrault, at the end of chapter two, and nothing is said about her...the reader doesn't even learn her name until early in chapter three, when she is badly injured, getting her throat slashed open in a fight between the team and a swarm of starving mangy huskies from an Indian village. A few paragraphs later comes the passage: "...Dolly, who had never been conspicuous for anything, went suddenly mad." This is the first time Dolly is directly addressed as an individual dog.
Apparently she got rabies from one of the half-wild dogs. The rest of the team flees from her in terror at her madness. She fixes on Buck and pursues him to the point of exhaustion, but Francois saves Buck by killing Dolly with an ax.
Unless you consider the ferocity -- caused by madness -- as a character trait, Dolly has no traits. As London wrote, she had never been conspicuous for anything.
the same amount of friends that michael has
Many characteristics are need, but two of the most important would be determination and common sense (if you want to call that a character trait).
source traits
inherited traits :]
the answer to this question is traits.
Traits
Antagonist
main character.
he called the observed traits dominant and the disapear traits recessive.
John Henry was known for being determined, hardworking, fearless, strong, and competitive. These traits allowed him to accomplish remarkable feats, such as outperforming the steam drill in the legendary contest.
round character
Genetic inheritance.