Unit 4. Choice Board.

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Across
  1. 2. A condition in which neither of two alleles of a gene is dominant or recessive.
  2. 3. changes in the chromosomes where parts of the chromosomes are broken and lost during mitosis
  3. 4. Error in meiosis in which homologous chromosomes fail to separate
  4. 9. Situation in which one allele is not completely dominant over another allele
  5. 12. genetic makeup of an organism
  6. 14. A chemical or physical agent that interacts with DNA and causes a mutation
  7. 15. The scientific study of heredity
  8. 19. An organism that has two different alleles for a trait
  9. 20. An organism's physical appearance, or visible traits
Down
  1. 1. Mendel's second conclusion, which states that some alleles are dominant and others are recessive
  2. 5. traits controlled by two or more genes
  3. 6. A chart that shows all the possible combinations of alleles that can result from a genetic cross
  4. 7. Describes a trait that covers over, or dominates, another form of that trait.
  5. 8. specific locations of genes along the chromosome
  6. 10. Mutations that produce changes in a single gene
  7. 11. Having two identical alleles for a particular gene
  8. 13. the cross of two genes in which one is dominant over recessive
  9. 16. (genetics) an organism or cell having two sets of chromosomes or twice the haploid number
  10. 17. An allele that is masked when a dominant allele is present
  11. 18. The ability of a single gene to have multiple effects.