Across
- 4. having two of the same alleles
- 6. a version of a gene
- 8. a portion of DNA that codes for a protein that is expressed into a trait
- 9. an organism's combination of alleles for a trait
- 11. the phenomenon of the egg and sperm combining randomly
- 13. when homologous chromosomes exchange alleles during prophase I
Down
- 1. having two different alleles
- 2. pair of chromosomes from your parents that carry different alleles for the same genes
- 3. when homologous chromosomes line up independently during metaphase I of meiosis I
- 5. the father of modern genetics
- 7. a cross of two parents who each have two alleles for one trait
- 10. a fertilized egg
- 12. an organism's physical expression of a trait; what they look like