k - human karyotype  

  The figure above represents a human karyotype. Pictures of individual human chromosomes are cut from of a picture taken during metaphase of mitosis and placed in pairs (homologous pair) in relation to their size. As mentioned earlier humans have a total of 46 chromosomes or 23 pairs. 

7. If a mother cell with 46 chromosomes enters the G-1 stage how many chromosomes will be in each of the two daughter cells formed at the end of the cycle? 

                             a. 12                               c. 46 
                             b. 23                               d. 92 
 
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8. If the mother cell contains 46 DNA molecules during the G-1 stage, how many DNA molecules 
 are present in the G-2 stage following the synthesis stage?  Explain in your notes. 

                               a. 12                                c. 46 
                               b. 23                                d. 92 
 
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 Looking at the correct answers for the two questions above, how can the number of chromosomes remain the same (46) while the number of DNA molecules double (92)? 

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