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________________. Taking another look at DNA. #1. DNA… A Quick Review. #2. What are chromosomes?. Chromosomes are ________________________________. #3. Structure of Chromosomes. Sometimes you may see chromosomes in ________. #4. Chromosomes come in ________________________.

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  1. ________________ Taking another look at DNA #1

  2. DNA… A Quick Review #2

  3. What are chromosomes? Chromosomes are ________________________________. #3

  4. Structure of Chromosomes Sometimes you may see chromosomes in ________. #4

  5. Chromosomes come in ________________________ The other matching half comes from the ____________. Half the chromosomes come from the ____________. #5

  6. Gene for eye color proteins Gene for hair color proteins What are genes? Genes are _______________ ________________________ ________________________ ________________________ #6

  7. Different organisms have different ___________________. Fruit fly DNA 8 chromosomes (__________) Human DNA 46 chromosomes (__________) #7

  8. All organisms have a certain number of chromosomes in their _____________ cells called the diploid number. __________ (2n)= _____ set of chromosomes (DNA) #8

  9. All organisms only have half the number of chromosomes in their _________________ called the haploid chromosome number. __________ (1n)= _____ set of chromosomes (DNA) #9

  10. 46 46 Sperm (male sex cell) from Dad Egg (female sex cell) from Mom Baby’s Body Cell Imagine a diploid human sperm and egg cell coming together… #10

  11. 23 23 Sperm (male gamete) from Dad Egg (female gamete) from Mom Baby’s Body Cell Now, imagine a haploid sperm and egg cell coming together… #11

  12. Keep these numbers in mind: Humans have ___ chromosomes, AKA ___ ___________________________. #12

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