Adam’s maternal and paternal chromosomes have alternate forms of a gene that influences whether a person is right-handed or left-handed. One form says “right” and its partner says “left.” Visualize one of Adam’s spermatogonia, in which chromosomes are being duplicated prior to meiosis. Visualize what happens to the chromosomes during anaphase I and II. (It might help to use toothpicks as models of the sister chromatids of each chromosome.) What fraction of Adam’s sperm will carry the gene for right-handedness? For left-handedness?