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Telomerase is active in cancer cells because:

Bonus: What are the expected phenotypic (dominant:recessive) and genotypic (homozygous dominant: heterozygous: homozygous recessive) ratios from a monohybrid cross of two heterozygotes (Aa × Aa)?

Comparing genomes of different species helps researchers:

Describe the different functions of proto-oncogenes and tumor suppressor genes and how their mutation can contribute to cancer.

Apoptosis is best described as:

Introns in mRNA are:

Embryonic stem cells are considered more versatile than adult stem cells because they:

Sister chromatids are best described as:

Describe two similarities and two differences between the structures of DNA and RNA.

Mutations contribute to genetic variation by: