The gene that controls the fur color of guinea pigs codes for either dominant black fur (B) or recessive white fur (b). Suppose you want to find the genotype of a black guinea pig. Explain how you would do a test cross. Then use one or both Punnett squares below to show possible testcross results.

A scientific understanding of which natural process helped Darwin formulate the concept of natural selection? A. artificial selection, B. continental drift, C. group selection, D. plant genetics.

Explain how speciation via polyploidy can happen in only two generations.

Which of the following represents a heterozygous genotype? a) GG b) gg c) Gg d) none of the above

Infer the consequences for evolution if species did not vary.

Research and compare two countries in the ways they depend on the environment for the products they export.