Adirect indication that the white blood cells of the body are functioning would be

Why are current extinctions of concern to enviromentalists?

How many autosomes are in this human karyotype? how many sex chromosomes?

3. in the fruit fly, recessive mutation brown, b, causes brown color of the eye and absence of red pigment. recessive mutation p of another independent gene causes purple color of the eye and absence of brown pigment. the cross of a brown-eyed female and purple-eyed male produced wild type eyes. what will be the colors and their ratio in f2?