Jessica (aged 32) is brca1 positive, which is known to greatly increase the risk for breast and ovarian cancer. she was tested because her mother, who had ovarian cancer, was brca1 positive. jessica has decided to have both of her ovaries removed because she believes that, in her family, being brca1 positive increases the risk for ovarian cancer only.
how should a genetic counselor respond to jessica’s statement?

a. encourage her to consider a bilateral mastectomy.
b. discuss jessica’s responsibility to inform all the other female members of her family about her brca1 status and cancer risk.
c. accept jessica’s explanation as a manifestation of her autonomy and remain nondirective in the interactions with her.
d. clarify that a brca1 mutation does not preferentially express ovarian cancer over breast cancer in any given family.

As a small change in a person's dna can cause a genetic disorder

Ayoung boy has been found and police are trying to locate his family they take a dna sample from him and begin collec dna samples from families who have missing children if police use dna samples only from the fathers, which type of dn technology can they use to identify the boy's parent? y-chromosome analysis omtdna (mitochondrial dna) analysis vntrs (variable tandem repeats) o pcr (polymerase chain reaction) analysis

Rease is an enzyme used by plants to break down urea (a nitrogen-containing compound) into carbon dioxide and ammonia. urease urea > > > carbon dioxide and ammonia ammonia is broken down by plants into a nitrogen source plants need to grow. thus, plants could not use urea as a nitrogen source unless it was first converted to ammonia. in soybean plants there are two different kinds of urease, one produced in the seeds and the other produced in the leaves of the plant. three types of soybean plants were used in a set of experiments: normal soybeans and two mutant strains, one lacking the urease in the seeds only (strain 1) and one lacking urease in the leaves only (strain 2). experiment 1 separate areas in a field were planted with normal, strain 1, and strain 2 soybeans. all types of soybeans appeared to grow, flower, and produce seeds equally well. there were no externally detectable differences among the strains. experiment 2 small pieces of plant leaves of equal weight were obtained from each type of soybean plant and separately placed on media in culture dishes. tissue growing in this way will become an unorganized clump of cells referred to as callus. to provide a controlled nitrogen source, half the tissue samples of each type were placed on media containing urea, and the other half of the samples were placed on media containing ammonia. after 30 days, the weight gain for each of the callus samples was determined. results are shown in the table below.