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Consider the below diagram of sedimentary layers. We know that the top layer is youngest. Which of the below is not one of the reasons we know this?
Tumor Suppressor Genes
Genes that regulate cell growth and division, and when mutated, can lead to a loss of cell control and cancer.
Oncogenes
Genes that have the potential to cause cancer when mutated or expressed at high levels.
Noncoding DNA
Segments of DNA that do not encode protein sequences, but may have regulatory functions and are involved in controlling gene expression.
Eukaryotic Chromosomes
Eukaryotic chromosomes are structures within the nucleus of eukaryotic cells, made up of DNA and protein, that carry genetic information.
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