during which step of meiosis does crossing over occur?
a. prophase i
b. anaphase i
c. telophase i
d. metaphase i

Which type of respiration takes place when there is no oxygen present

How can active reading strategies you? o a. they can you get into better physical shape. o b. they can you read fewer science articles. o c. they can you understand what you read. o d. they can you avoid reading altogether.

What are the fixed alleles in the human species? o a. the alleles that are on the most chromosomes b. the alleles that change most often 000 c. the alleles that no one has d. the alleles that everyone has