Answer: allele, gene, DNA, chromosome, nucleus
Explanation: An allele is a variant of a gene or a different form of a gene. A gene is a segment of a DNA that codes for an RNA or a protein. A DNA is a genetic material that contains all the genetic information of an organism. A DNA is packaged and condensed into a threadlike material known as chromosome and chromosomes are found in the nucleus of a cell.
Answer:
I think it's the first and the second ... but I'm not sure
Answer:
crossing over
Explanation:
Crossing over is where homologs can exchange DNA which leads to genetic variation
The way animals or creatures change and adapt over time
