The American robin (Turdis migratorius) is a common songbird found throughoutNorth America. It feeds mostly on insects, fruits, and berries. Its average lifespan isabout 2 years. Only 25 percent of robins survive after one year. Despite this seeminglylow survival rate, the American robin is among the most abundant species in […]

Explain a specific example of a cross between two parents, each homozygous for different traits, which would result in a phenotype that is distinct from either parental phenotype. 1. Indicate the genotype and phenotype of each parent and the offspring.2. Indicate the inheritance pattern of the character described. Rules:1. You […]

A growing concern for treating bacterial diseases or pest outbreaks is the evolution of antibiotic or pesticide resistance by bacterial or pest populations. Resistance means that a particular antibiotic is no longer effective in treating a disease, or that a particular pesticide will no longer prevent crop damage. This resistance […]

A new kind of tulip is produced that develops only purple and pink flowers. Assume that flower color is controlled by a single-gene locus and that the purple allele (C) is dominant to the pink allele (c). A random sample of 1000 tulips froma larg cultivated field yields 812 purple […]