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BEIJING BISS INTERNATIONAL SCHOOL GRADE 10 SCIENCE NAME: _____________________________________ HOMEROOM: UNIT(S): 10-05 – Inheritance and Reproduction DUE DATE: DNA Review Directions: Complete the following questions. You can only write on the lines provided, the goal is for you to write as specific as possible. Use your own words! 1. What is the difference between genes and chromosomes? Write a definition of each below and then explain how they are linked together. Genes: _______________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Chromosomes: ________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ How they are linked: ___________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ 2. Draw a labelled diagram of DNA. Make sure to include a organic bases, sugar-phosphate backbone and the sugar group. 3. Why is the order of the bases important?__________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ 4. How is DNA related to genes and chromosomes? Be specific. ?_______________________ _____________________________________________________________________________ ______________________________________________________________________________ ____________________________________________________________________________ 3. What is the difference between an organism’s genotype and it’s phenotype? definition of each below and then explain how they are linked together. Write a Genotype: ____________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Phenotype: ____________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ How they are linked: ___________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ 4. What is the difference between a dominant gene and a recessive gene? Dominant Gene: _______________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Recessive Gene: _______________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________