Final answer:
To compare many genes in an organism, you can use methods such as genetic crosses, genome map viewer, and microarray analysis.
Step-by-step explanation:
When comparing many genes in an organism, there are several methods that can be used:
- Genetic Crosses: By performing genetic crosses and comparing expected and observed phenotypic ratios, inheritance patterns can be investigated. This can be done using organisms such as Wisconsin Fast Plants or Drosophila melanogaster.
- Genome Map Viewer: Using a genome map viewer, scientists can compare the gene sequences of many organisms to identify common DNA sequences. This can help determine evolutionary relationships and understand genome content.
- Microarray Analysis: Microarray analysis allows for the comparison of gene expression patterns between different cell types. It is useful for studying gene expression in infected or cancerous cells.