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All 10 questions. After you submit, each question shows the right answer and why. Back to the quick check
What are genes made of?
You usually get one copy of each gene from each of your two parents.
Some genes never make a protein; instead they help control other genes.
What are slightly different versions of the same gene called?
Most gene variants cause disease.
A protein is 120 amino acids long. Not counting the stop codon, how many mRNA nucleotides are needed to code for it?
Which sequence correctly describes how a protein-coding gene is used in a human cell?
Almost every cell in your body carries the same genes, yet nerve cells and muscle cells are very different. Which explanation fits the evidence best?
A variant appears in one skin cell after ultraviolet damage. Explain why it cannot be passed on to that person's children.
The Human Genome Project era estimated 20,000–25,000 human protein-coding genes; current resources give about 19,900. Explain why a gene count can move as evidence improves, and why that does not undermine the concept of a gene.
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