Heredity & Periodic Table

123456789101112131415161718192021
Across
  1. 2. (2 words)number of protons (which equals the number of electrons) in an atom.
  2. 5. A column on the periodic table
  3. 6. We use letters to describe genes: Blue Eyes = (bb. These letters are called____
  4. 7. Males have ___ and ___ chromosomes
  5. 9. (2words)The very unreactive gases found in Group 8 of the periodic table.
  6. 10. A charged particle produced by the loss or gain of electrons
  7. 13. A combination of two or more substances that are not chemically combined.
  8. 15. A substance made up of a combination of two or more different elements
  9. 16. A trait that always comes out
  10. 17. The two sex chromosomes are ___ and ___.
  11. 19. A tiny particle with practically no mass and a negative charge.
  12. 20. Each species has a certain number of _______.
  13. 21. When your genes are expressed physically (how you look) we call that your___
Down
  1. 1. A tiny positive particle found inside the nucleus of an atom.
  2. 2. (2words)element in group 1 of the periodic table
  3. 3. Two or more atoms combined together to form a larger particle
  4. 4. (2 words)RR is____ ____
  5. 8. Atoms that have the same number of protons but different number of neutrons
  6. 11. Females have ___ and ___ chromosomes
  7. 12. Yy is ____
  8. 14. Smallest particle of a chemical element. It is made of a nucleus and orbiting electrons.
  9. 18. The elements found in Group 7 of the periodic table.
  10. 19. A substance made up of only one type of atom.