Darwin and Evolution

1. In pea plants, the allele for yellow pods is recessive to the allele for green pods. If you cross a heterozygous, green pod-producing plant with a yellow pod-producing plant, what will be the ratios of phenotypes and genotypes among their offsprings?

Darwin and Evolution

1. List four (4) reasons why Darwin failed to publish his ideas about natural selection for almost 20 years? 2. Eye color in fruit flies (Drosophila) is a sex-linked trait where the dominant allele coes for red eyes and the recessive codes for white eyes. If you cross a white-eyed female with a red-eyed male, what eye colors will the offspring have?

Darwin and Evolution

1. What are prokaryotes and eukaryotes? List three (3) ways prokaryotes differ from eukaryotes. 2. Natural selection is essentially a two-step process, what are the two steps?

Darwin and Evolution

1. Why are each of the following important to evolution? a) Cambrian explosion b) homology c) population thinking d) Archaeopteryx 2. Genetics obviously plays a major role in evolution. How do each of the following genetic processes enhance evolution? a) sexual reproduction b) recombination c) gene interactions (epistasis) d) hox (homeobox) genes

Differences between protostomes and deuterostomes

Once multicellular organisms evolved bilateral symmetry, they soon split into two major evolutionary lines: Protostomes and Dueterostomes. Examples of protostomes include insects, earthworms, and clams; examples of dueterostomes include humans, snakes, and sea urchins. What is the scientific/evolutionary basis of dividing most multicellular animals into these two groups and list two (2) specific differences theses two groups exhibit.