In a duplication, a person has more than two alleles for a certain trait. crossing-over between sister chromatids has occurred twice a particular segment is missing on one chromosome. a chromosomal segment is turned 180 degrees. chromosomal segments are exchanged between two nonhomologous chromosomes. 4 points save answer

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs

What type of pollution does household garbage cause

The structure that houses the cells genetic information.