Indoor air pollution can arise from both natural processes and human activities. which of the following is a combination of three natural causes of indoor air pollution? a) secondhand smoke, mold, and radon gas b) radon gas, pesticides, and dust mites c) asbestos, mold, and radon gas d) volatile organics, sulfur dioxide, and formaldehyde

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4

What advantages does a pedigree have over a written passage?

Can a trait be both polygenic and have multiple alleles? explain why or why not.