Unit !- Genetics and Heredity

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Across
  1. 2. is a gene whose effects are masked in the presence of a dominant gene
  2. 5. process of fertilizing an egg, female animal, or plant, involving the fusion of male and female gametes to form a zygote
  3. 8. is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment
  4. 12. a diploid cell resulting from the fusion of two haploid gametes; a fertilized ovum
  5. 13. having a single set of unpaired chromosomes
  6. 15. having the same relative position, value, or structure
  7. 17. is any cell of the body except sperm and egg cells
  8. 18. is the basic physical and functional unit of heredity
  9. 20. expresses itself more strongly all by itself than any other version of the gene which the person is carrying
Down
  1. 1. is the process by which a molecule of DNA is duplicated
  2. 3. having two different alleles of a particular gene or genes
  3. 4. the hereditary material in humans and almost all other organisms
  4. 6. one of two or more alternative forms of a gene that arise by mutation
  5. 7. structure found inside the nucleus of a cell
  6. 9. containing two complete sets of chromosomes, one from each parent.
  7. 10. a process where a single cell divides twice to produce four cells containing half the original amount of genetic information
  8. 11. large, complex molecules that play many critical roles in the body
  9. 14. is a change in a DNA sequence
  10. 16. the young creation of living organisms
  11. 19. is a molecule similar to DNA