Across
- 2. The evolution of a new species
- 3. A sequence of nucleotides that codes for building a protein
- 4. A change that increases the biological fitness of some members of a species
- 5. A type of cell with a diploid number of chromosomes
- 7. Part of a chromosome that attaches to spindle fibers
- 8. A group of individuals that can interbreed to produce fertile offspring
Down
- 1. The removal of a species from the planet Earth
- 3. A type of cell with a haploid number of chromosomes
- 4. The alternative forms of a given gene
- 6. Evidence of a past life in rocks, that shows gradual change occurs in species