Sex Cells and Fertilisation Sexual Reproduction
Sexual Reproduction <ul><li>Copy the following definition: </li></ul><ul><li>Reproduction  is the method by which the memb...
Sexual Reproduction (plant) Petals Anther Filament Nectary Sepal Ovule Style Stigma Ovary Stamen }
Sexual Reproduction (plant) Pollen Tube
Sexual Reproduction (mammal) Nucleus – contains information in chromosomes Cytoplasm – contains food store Head Tail – all...
Sexual Reproduction (mammal) Fertilisation is when the two nuclei fuse
Sexual Reproduction <ul><li>Note: </li></ul><ul><li>Fusion of nuclei forms a  zygote  containing genetic material from bot...
Sexual Reproduction Notes <ul><li>Answer Tp163-164 ‘Testing Your Knowledge’  in sentences . </li></ul><ul><li>Collect cut-...
Sex Cells and Fertilisation Genetics
Genetics Notes <ul><li>Copy the definition below: </li></ul><ul><li>Chromosomes  are thread-like structures found inside t...
Genetics The number of chromosomes present in an organisms’ cells depends on its species. e.g Human Male 46   Chromosomes
Genetics The thread-like chromosomes are made of a chemical substance called DNA. DNA carries coded genetic information. D...
Genetics Notes <ul><li>Copy the definition below: </li></ul><ul><li>A  gene  is a section of a chromosome which contains a...
Genetics <ul><li>Rows of four different  </li></ul><ul><li>bases make up a  strand of DNA. </li></ul><ul><li>The order of ...
Genetics A  A  C  T  G  C  C  G  T  A  T  G  The genetic code found in genes gives the cells instructions to make protein ...
Genetics Notes <ul><li>Answer Tp167  Q2  in sentences . </li></ul><ul><li>Label the cut-out and stick it in. </li></ul>
Genetics <ul><li>Protein  molecules are made from combinations of  20  available  amino acids , linked together in a long ...
Genetics <ul><li>Three  bases (e.g. ATG) carry the code for  one   </li></ul><ul><li>amino acid. </li></ul>Each  amino aci...
Genetics The amino acids are linked together to make a protein. The sequence of amino acids dictates the structure and fun...
Genetics Notes <ul><li>Complete the cut-out and stick it in. </li></ul><ul><li>Answer Tp167  Q3 . </li></ul><ul><li>Use th...
Fertilisation Mini Essay Describe  how  and  where  fertilisation occurs in a flowering plant. For Wednesday 15 th  December
Sex Cells and Fertilisation Gamete Production
Gamete Production Notes <ul><li>Note : </li></ul><ul><li>Body cells have  two  matching sets of chromosomes. Gametes have ...
Gamete Production Chromosome Chromatid Chromatid Centromere Centromere Centromere
Gamete Production Notes <ul><li>Copy these definitions: </li></ul><ul><li>A  chromatid  is the name given to each single s...
4 gametes produced. Gamete Mother cell.  4 double chromosomes. Matching chromosomes pair. Line up across cell Pairs separa...
Gamete Production Notes <ul><li>Answer Tp173  Q2+3   in sentences . </li></ul>
Sperm  Mother cell Egg  Mother cell Cell ready to divide again Sperm cell Egg cell MEIOSIS Zygote FERTILISATION
Sex Cells and Fertilisation Sex Determination
Sex Determination Notes <ul><li>Every normal body cell in a human being contains 46 chromosomes as 23 pairs. </li></ul><ul...
Sex Determination Notes <ul><li>Complete and stick in the sex chromosomes cut-out. </li></ul>
Gamete Production <ul><li>Note :  </li></ul><ul><li>In humans, each male gamete has an X or a Y chromosome, while each fem...
Gamete Production <ul><li>Look at Tp175  Q5  (you don’t need to write anything down – just think about the question.) </li...
Sex Cells and Fertilisation Genes and Alleles
Genes and Alleles Note <ul><li>Chromosomes  are made up of smaller units called  genes . Each gene is a unit of heredity t...
Genes and Alleles Note <ul><li>Alleles  are different forms of a particular gene. At least two forms of each gene normally...
Genes and Alleles Note <ul><li>Using the green booklets, make notes on 6.7  section 2 only  (The Segregation of Alleles) <...
Upcoming SlideShare
Loading in …5
×

6.sex cells and fertilisation

1,748 views

Published on

Published in: Education, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
1,748
On SlideShare
0
From Embeds
0
Number of Embeds
75
Actions
Shares
0
Downloads
22
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

6.sex cells and fertilisation

  1. 1. Sex Cells and Fertilisation Sexual Reproduction
  2. 2. Sexual Reproduction <ul><li>Copy the following definition: </li></ul><ul><li>Reproduction is the method by which the members of a species produce offspring. Sexual reproduction involves the fusion of two gametes (sex cells) during fertilisation . </li></ul>
  3. 3. Sexual Reproduction (plant) Petals Anther Filament Nectary Sepal Ovule Style Stigma Ovary Stamen }
  4. 4. Sexual Reproduction (plant) Pollen Tube
  5. 5. Sexual Reproduction (mammal) Nucleus – contains information in chromosomes Cytoplasm – contains food store Head Tail – allows sperm to swim to egg
  6. 6. Sexual Reproduction (mammal) Fertilisation is when the two nuclei fuse
  7. 7. Sexual Reproduction <ul><li>Note: </li></ul><ul><li>Fusion of nuclei forms a zygote containing genetic material from both parents. </li></ul>
  8. 8. Sexual Reproduction Notes <ul><li>Answer Tp163-164 ‘Testing Your Knowledge’ in sentences . </li></ul><ul><li>Collect cut-outs and </li></ul><ul><ul><li>label the parts </li></ul></ul><ul><ul><li>draw an ‘X’ where fertilisation occurs </li></ul></ul><ul><li>Extension work – Success Guide p36-37 </li></ul>
  9. 9. Sex Cells and Fertilisation Genetics
  10. 10. Genetics Notes <ul><li>Copy the definition below: </li></ul><ul><li>Chromosomes are thread-like structures found inside the nucleus of every living cell. They contain genetic information which gives rise to an organisms characteristics. </li></ul>
  11. 11. Genetics The number of chromosomes present in an organisms’ cells depends on its species. e.g Human Male 46 Chromosomes
  12. 12. Genetics The thread-like chromosomes are made of a chemical substance called DNA. DNA carries coded genetic information. DNA has two strands which form a twisted structure called a helix. Each piece of information is called a gene.
  13. 13. Genetics Notes <ul><li>Copy the definition below: </li></ul><ul><li>A gene is a section of a chromosome which contains a separate piece of genetic information. </li></ul>
  14. 14. Genetics <ul><li>Rows of four different </li></ul><ul><li>bases make up a strand of DNA. </li></ul><ul><li>The order of the bases </li></ul><ul><li>makes the DNA code. </li></ul>A A C T G C C G T A T G Adenine (A) Thymine (T) Guanine (G) Cytosine (C)
  15. 15. Genetics A A C T G C C G T A T G The genetic code found in genes gives the cells instructions to make protein molecules. <ul><li>The proteins produced have a variety of jobs e.g. </li></ul><ul><li>structural (muscle tissue), </li></ul><ul><li>controlling cell activities (enzymes) </li></ul>
  16. 16. Genetics Notes <ul><li>Answer Tp167 Q2 in sentences . </li></ul><ul><li>Label the cut-out and stick it in. </li></ul>
  17. 17. Genetics <ul><li>Protein molecules are made from combinations of 20 available amino acids , linked together in a long chain. </li></ul><ul><li>The DNA molecule tells the cells which amino acids to use when making a specific protein . </li></ul>
  18. 18. Genetics <ul><li>Three bases (e.g. ATG) carry the code for one </li></ul><ul><li>amino acid. </li></ul>Each amino acid is different depending on the combination of bases (e.g. CGT, TGC, AAG etc) Amino acid Amino acid Amino acid Amino acid
  19. 19. Genetics The amino acids are linked together to make a protein. The sequence of amino acids dictates the structure and function of the protein. Amino acid Amino acid Amino acid Amino acid Protein molecule
  20. 20. Genetics Notes <ul><li>Complete the cut-out and stick it in. </li></ul><ul><li>Answer Tp167 Q3 . </li></ul><ul><li>Use the passage ‘Proteins’ on Tp165 to make a note about the relationship between proteins present in a cell and an organism’s characteristics. </li></ul><ul><li>Extension work: Success Guide p38-39. </li></ul>
  21. 21. Fertilisation Mini Essay Describe how and where fertilisation occurs in a flowering plant. For Wednesday 15 th December
  22. 22. Sex Cells and Fertilisation Gamete Production
  23. 23. Gamete Production Notes <ul><li>Note : </li></ul><ul><li>Body cells have two matching sets of chromosomes. Gametes have one set of chromosomes. </li></ul><ul><li>The reduction in number of chromosomes to a single set occurs during meiosis (gamete formation). </li></ul>
  24. 24. Gamete Production Chromosome Chromatid Chromatid Centromere Centromere Centromere
  25. 25. Gamete Production Notes <ul><li>Copy these definitions: </li></ul><ul><li>A chromatid is the name given to each single strand of a double chromosome </li></ul><ul><li>A centromere is part of a single chromosome. In double chromosomes, it holds the two chromatids together. </li></ul>
  26. 26. 4 gametes produced. Gamete Mother cell. 4 double chromosomes. Matching chromosomes pair. Line up across cell Pairs separate. Cell divides. Chromosomes line up. Each cell divides again. Centromeres split Chromatids pulled apart
  27. 27. Gamete Production Notes <ul><li>Answer Tp173 Q2+3 in sentences . </li></ul>
  28. 28. Sperm Mother cell Egg Mother cell Cell ready to divide again Sperm cell Egg cell MEIOSIS Zygote FERTILISATION
  29. 29. Sex Cells and Fertilisation Sex Determination
  30. 30. Sex Determination Notes <ul><li>Every normal body cell in a human being contains 46 chromosomes as 23 pairs. </li></ul><ul><li>Of these, one pair makes up the sex chromosomes. </li></ul><ul><li>Females have two large X chromosomes, while males have a large X and a small Y chromosome. </li></ul>
  31. 31. Sex Determination Notes <ul><li>Complete and stick in the sex chromosomes cut-out. </li></ul>
  32. 32. Gamete Production <ul><li>Note : </li></ul><ul><li>In humans, each male gamete has an X or a Y chromosome, while each female gamete has an X chromosome. </li></ul><ul><li>Now fill in the sex determination grid to work out the expected ratio of boys:girls. </li></ul>
  33. 33. Gamete Production <ul><li>Look at Tp175 Q5 (you don’t need to write anything down – just think about the question.) </li></ul>
  34. 34. Sex Cells and Fertilisation Genes and Alleles
  35. 35. Genes and Alleles Note <ul><li>Chromosomes are made up of smaller units called genes . Each gene is a unit of heredity that controls an inherited characteristic (e.g. wing type, hair texture, flower colour, etc.) </li></ul>
  36. 36. Genes and Alleles Note <ul><li>Alleles are different forms of a particular gene. At least two forms of each gene normally exist among the members of a species. For example in pea plants, the gene controlling flower colour can produce lilac or white coloured flowers. </li></ul><ul><li>The alleles of a gene are found at the same location on each member of a pair of chromosomes. </li></ul>
  37. 37. Genes and Alleles Note <ul><li>Using the green booklets, make notes on 6.7 section 2 only (The Segregation of Alleles) </li></ul><ul><li>Read through 6.7 section 3 </li></ul><ul><li>Finally, attempt the check test for 6.7. </li></ul>

×