Genetic terminology

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Across
  1. 2. A state where an individual has two identical alleles for a gene. (10 letters)
  2. 5. The physical appearance or trait expression of an organism. (9 letters)
  3. 6. The exchange of genetic material between homologous chromosomes during meiosis. (14 letters, two words)
  4. 11. A condition where both alleles in a heterozygous organism contribute equally to the phenotype. (11 letters)
  5. 13. Different forms of the same gene. (7 letters)
  6. 14. The pair of threads formed by the replication of a chromosome during cell division. (17 letters, two words)
Down
  1. 1. A state where an individual has two different alleles for a gene. (12 letters)
  2. 3. Small segments of DNA that code for proteins. (5 letters)
  3. 4. The dominant allele masks the effect of this type of allele. (12 letters)
  4. 6. The specific point of contact between homologous chromosomes during crossing over. (7 letters)
  5. 7. The observable traits depend on this genetic makeup. (8 letters)
  6. 8. A specific location on a chromosome where a gene is found. (5 letters)
  7. 9. A permanent alteration in the DNA sequence. (8 letters)
  8. 10. A physical or genetic characteristic's overriding allele. (9 letters)
  9. 12. Structures made of DNA and protein, carrying genetic information. (10 letters)