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Lesson 2 Inheritance And Selection


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Lesson 2 Inheritance And Selection

  1. 2. <ul><li>1. Why are brothers and sisters different from each other? </li></ul><ul><li>2. What are the male and female sex cells called? </li></ul><ul><li>3. How is genetic information stored? </li></ul><ul><li>4. What do we call the meeting of male and female sex cells. </li></ul>A. DNA (deoxyribonucleic acid). B. Fertilisation C. Have different set of genes. D. Sperm and egg
  2. 3. <ul><li>1. They have different set of genes </li></ul><ul><li>2. Sperm and egg </li></ul><ul><li>3. DNA (deoxyribonucleic acid) </li></ul><ul><li>4. Fertilisation </li></ul>
  3. 4. <ul><li>that cells have nuclei which contain information that is transferred from one generation to the next. </li></ul><ul><li>how sperm and egg cells are specialised. </li></ul><ul><li>genetic information from male and female parents is combined during fertilisation. </li></ul>
  4. 5. <ul><li>Use the following words to write a sentence </li></ul><ul><ul><li>Egg </li></ul></ul><ul><ul><li>Fuse (join) </li></ul></ul><ul><ul><li>Fertilisation </li></ul></ul><ul><ul><li>sperm </li></ul></ul>
  5. 6. <ul><li>DNA (deoxyribonucleic acid) , </li></ul><ul><li>GAMETE, </li></ul><ul><li>GENE, </li></ul><ul><li>SEXUAL REPRODUCTION, </li></ul><ul><li>ASEXSUAL REPRODUCTION, </li></ul><ul><li>CHROMOSOMES, </li></ul><ul><li>EMBRYO. </li></ul>
  6. 7. <ul><li>Arrange the following words starting from the biggest to the smallest. </li></ul><ul><li>Cell, Nucleus, chromosomes, and genes </li></ul>
  7. 8. <ul><li>Suggest how offspring inherit characteristics from their parents ? </li></ul><ul><li>As a remainder refer on the work you did on reproduction in unit 7B 'Reproduction' and unit 7A 'Cells' . </li></ul>
  8. 9. <ul><li>Activity 5 </li></ul><ul><li>Sexual Reproduction </li></ul><ul><li>Sexual reproduction involves …………… The parents have sex organs which produce ……….or …………...  </li></ul><ul><li>The male gamete is ……….. and the female gamete is the ………. </li></ul>So what causes variation?
  9. 10. <ul><li>Activity 6 </li></ul><ul><li>Draw and label the female and male sex cells and explain how their structure allow them to do there job (function). </li></ul>
  10. 11. <ul><li>Sperm cell </li></ul>
  11. 12. <ul><li>Egg </li></ul>
  12. 13. <ul><li>The female and male sex cells have nuclei which contain information that is transferred from one generation to the next. </li></ul><ul><li>Discus in groups of 3, </li></ul><ul><li>How is this information is transferred from one generation to the next. </li></ul>
  13. 14. Sex Cells Other Cells
  14. 15. Label the parts of the flower And identify the male & female sex cells and where they are produced.
  15. 16. <ul><li>During fertilisation animal and plant cells pass on 'information‘ ('gene' and 'genetic information‘) in the nuclei from one generation to another. </li></ul><ul><li>Genes are instructions that control the characteristics that develop; the nucleus contains the thousands of genes needed to produce an individual. </li></ul><ul><li>Genes are associate with particular inherited characteristics </li></ul>
  16. 17. <ul><li>the fusion of male and female sex-cell nuclei in both animals and plants produces a new individual that is genetically unique </li></ul>