Heredity and Environment (ch.3)

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Across
  1. 2. genes that combine to make __________
  2. 5. long string of amino acids
  3. 8. genes that have a ________ influence over _______ genes
  4. 12. genes that cause distinctions
  5. 15. the genes that are _______
  6. 17. entire ______ inheritance
  7. 18. building blocks of life
  8. 20. another word for sperm and ovum
  9. 21. the thing that makes everyone unique
  10. 22. identical twins
  11. 24. when an ova is surgically removed from a women and mixed with sperm
  12. 25. fraternal twins
Down
  1. 1. female______
  2. 3. XY or XX determinate
  3. 4. a medical intervention to help couples conceive
  4. 6. a variant of a gene
  5. 7. when the female and male gamete fuse
  6. 9. The different parts of DNA
  7. 10. the genes found in the X chromosome
  8. 11. The basic units of heredity
  9. 13. male ______
  10. 14. when the code of a gene from one parent differs from the code of its __________ from the other gene
  11. 16. Instructions to make a ______
  12. 19. when the gene from one parent ________ from the other parent
  13. 23. inability to _______ after least a year