What is the purpose of crossing-over in meiosis? A. to create mutations in gametes to increase variation
B. to randomly separate homologous chromosome pairs
C. to reduce the number of chromosomes in gametes by one half
D. to create new combinations of DNA on homologous chromosomes

A

Explanation:

During prophase I of meiosis, crossing over that occurs between non-sister chromatids of homologous chromosomes pairs occurs at chiasma results in the exchange of genetic material. This produces new genetic combinations in gametes leading to variation.

this protocol provides a detailed procedure for chromatin immunoprecipitation (chip) to study the dna-protein interactions.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above