Hey, how would I get the half-life and age of the rock in the senecio? Uranium 235 decays into Lead 207. The half-life is 704 million years. If the amount of Uranium 235 is equal to the amount of Lead 207

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. a parakeet that is heterozygous for blue feathers (dominant) is crossed with a parakeet that is homozygous for white feathers (recessive). according to the punnett square for this cross, what percentage of offspring is predicted to have blue feathers? 25 percent 50 percent 75 percent 100 percent