Unit 2 Genetics and Heredity

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Across
  1. 3. Biological catalyst and is almost always a protein.
  2. 5. A tool that helps to show all possible allelic combinations of gametes in a cross of parents with known genotypes.
  3. 7. Fertilized egg cell that results from the union of a female gamete (egg, or ovum) with a male gamete (sperm).
  4. 9. A change in the DNA sequence of an organism.
  5. 10. The product of the reproductive processes of a person, animal, or plant.
  6. 13. The observable characteristics in an individual resulting from the expression of genes.
  7. 15. Having different alleles for a particular trait.
  8. 17. The presence of a single set of chromosomes in an organism's cells.
  9. 19. A process of cell duplication, or reproduction, during which one cell gives rise to two genetically identical daughter cells.
  10. 20. A nucleic acid present in all living cells that has structural similarities to DNA.
Down
  1. 1. A term that is used to describe an allele, a gene, or a trait that is expressed (masks the recessive).
  2. 2. A trait that is expressed only when genotype is homozygous.
  3. 4. The union of two gametes.
  4. 6. A structure found inside the nucleus of a cell.
  5. 8. The basic unit of heredity passed from parent to child.
  6. 11. A reproductive cell of an animal or plant.
  7. 12. The molecule inside cells that contains the genetic information responsible for the development and function of an organism.
  8. 14. A special form of cell division in which each daughter cell receives half the amount of DNA as the parent cell.
  9. 16. The genetic makeup of an organism.
  10. 18. Large, complex molecules that play many critical roles in the body.