Can be used to date fossils in rocks to give an approximate age.

a.

isotope

c.

radiocarbon dating

b.

half - life

d.

relative dating

1. mendel observed that pea plants had traits, such as color, that were either “one or the other,” never something in between. discuss the correlation between mendel’s factors, what they might be, and why pea plant traits come in one form or another—e.g., gray or dark red—rather than blended.