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Transcript
9Ac-5 Chromosomes, genes and DNA Name Class Date 1 a Every chromosome contains a long molecule. What is this molecule? b In what part of a cell are chromosomes found? 2 Look at the bar chart. a How many chromosomes does a cat body cell have? b Which species has 66 chromosomes in its body cells? c On the chart, fill in the missing bar for humans. d Why is the total number of chromosomes in each species an even number? e Do you think there is a correlation (relationship) between the size of an organism and the number of chromosomes in its body cells? f Explain your answer to part e. 3 a Where are genes found? b What do genes contain instructions for? 4 James Watson, Francis Crick, Rosalind Franklin and Maurice Wilkins all helped to discover the structure of DNA. a Fill in the names below, to show what the scientists did. Just write in their last names. b Number the boxes to show the order in which these events occurred. helped build a correct double-helix model of DNA. recognised the pattern on an X-ray photo. showed an X-ray photo to Francis Crick. told Watson and Crick their model was wrong. took a very good X-ray photo of DNA. I can… ● outline how the structure of DNA was discovered ● explain the importance of DNA ● describe the relationship between cells, chromosomes, DNA, genes and genetic information. © Pearson Education Ltd 2015. Copying permitted for purchasing institution only. This material is not copyright free. 24
