If you live with a person who has hiv can you also get it?

Correct Yes

If anybody is living with a person who has HIV is likely to be infected with the AIDS virus, it means they are able to pass HIV to others.

AIDS stands for Acquired Immune Deficiency Syndrome, in this the immune system of the body is weakened. If anyone is infected with human immuno virus, then that person can expand the infection to other healthy one and if it develops into AIDS, it can spread to other people. It spreads when the infected blood or the body fluids enter the body.

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.