Two brown-eyed parents have produced three blue-eyed sons. What can be concluded about the parents? Only the father carries an allele for blue eyes.

Only the mother carries a dominant allele for blue eyes.

The allele for blue eyes is on the father's Y chromosome.

They both carry a recessive allele for blue eyes.

Nucleic acid certain protein cell membranes certain carbohydrates

Identify the composition of oceanic and continental crystal rocks. in a model of earth’s interior, where would these rocks appear?

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.