Genetics Crossword
Decode 18 clues spanning the core vocabulary of genetics — from genes and alleles to meiosis, mutations, and the central dogma. Complete each word to unlock an encyclopedic definition.
How to Play
- Click a white cell to select it — click the same cell again to toggle Across/Down direction.
- Type a letter to fill the cell; the cursor advances automatically.
- Use arrow keys to move through the grid; Tab jumps to the next word.
- Click a clue in the list to jump directly to that word.
- Press Check Answers to see correct (green) and wrong (red) cells.
- Reveal Word fills the current word (−50 pts penalty).
- Complete a word correctly to unlock its encyclopedic definition!
Building your crossword…
Genetics Vocabulary: Key Terms Explained
Genetics is the science of heredity and variation — how traits are passed from parents to offspring through genes encoded in DNA. Understanding genetics vocabulary unlocks the molecular logic behind everything from eye color to inherited diseases to evolutionary change.
Gene and Allele
A gene is a DNA segment coding for a trait; an allele is one specific version of that gene. Having two alleles (one from each parent) means every diploid organism carries two instructions for each trait — and which allele "wins" depends on dominance.
Genotype vs. Phenotype
Genotype is the genetic code you carry (e.g., Bb); phenotype is the visible result (brown eyes). The same phenotype can arise from different genotypes — a brown-eyed person can be BB or Bb — which is why traits can seemingly "skip" generations.
Dominant and Recessive Alleles
A dominant allele is expressed whenever it is present; a recessive allele is expressed only when paired with another recessive copy. Many genetic disorders are recessive: carriers appear healthy but can pass the allele to children.
DNA Transcription and Translation
The central dogma of molecular biology: DNA is transcribed into mRNA (messenger RNA) in the nucleus, then translated into protein at ribosomes in the cytoplasm. This two-step process converts genetic information into functional molecules that run the cell.
Meiosis and Genetic Diversity
Meiosis produces haploid gametes (sperm and eggs) by dividing the chromosome count in half. Crossing over — swapping DNA segments between chromosome pairs — shuffles alleles, creating unique combinations in every gamete and ensuring no two offspring are genetically identical (except identical twins).
Mutations
Mutations are permanent changes to the DNA sequence. Most are neutral or slightly harmful, but occasional mutations provide survival advantages and are the raw material of evolution. Somatic mutations (in body cells) cause cancer; germline mutations (in gametes) are heritable.
Why Study Genetics?
Genetics touches medicine, agriculture, evolution, forensics, and biotechnology. From personalized cancer treatments (targeting specific gene mutations) to GMO crops (inserting beneficial genes) to ancestry DNA testing (tracing family history through genetic markers), genetics applications shape modern life. CRISPR gene-editing technology — allowing scientists to cut and repair specific DNA sequences — may soon cure inherited diseases that were once untreatable.