Making babies Unit

1. Making babies Unit Year 10

2. DNA Structure and Function

3. If you flatten out a double helix shaped DNA molecule, you can see that the DNA is made up of bases, of which there are four different kinds in DNA. They are shown below using the letters A, T, C and G. The order in which these bases occur makes up the genetic code.DNA video DNA

5. Base pairing. • The A goes with T and the G goes with C.

6. DNA replication. • How does DNA make copies of itself?

12. Today • Keywords 1-10 • Review DNA. • DNA video. • Handout 2. • Mitosis steps; scientific name.

14. Mitosis http://www1.teachertube.com//googleSearch.php?cx=012339422634307447803%3Ah-vlw-wg9yy&cof=FORID%3A11&ie=UTF-8&q=mitosis&sa=Search

16. Living things grow by cell d_________ . When a cell gets to a certain size, the c_____________ are copied. Each new cell gets an i___________ copy of the chromosomes, because the D____ in the chromosomes provides the instructions for everything cells do. Once the cells are ready to divide, the chromosomes c______ up and become visible. The chromosomes line up across the middle of the cell and one copy of each chromosome is pulled to each side of the cell by i________ strands. Once the chromosomes have pulled apart, a new cell w_____ forms, creating two cells, which can continue to grow.

17. Cell division Mitosis Meiosis For sexual reproduction. Makes eggs and sperm with half the normal amount of DNA. • For growth & repair. • Makes 2 identical cells.

18. Today • KW 11-20 • Animal cells • Animal cell models

19. Animal Cell Structure

21. Organelles • Cell membrane- holds the organelles within the cell. • Cytoplasm- jelly-like substances containing water, sugar & salts. • Nucleus- holds the DNA. • E.R.- makes chemicals. • Mitochondria- powerhouse of the cell, turns glucose into ATP.

22. Ribosomes- make proteins. • Golgi bodies- transports chemicals around the cell and body. • Centrioles- make spindle fibres for mitosis

23. Drawing Cheek Epithelial Cells

24. Animal cells- specialized. • You are to create a specialized animal cell to display on the wall. • You are to label the important organelles for your cell and give a brief description of the cells function.

25. Animal Cell Types

30. Info-graphic. Neuron (nerve cell) This cell carries electrical signals from the brain to all parts of the body. It has more mitochondria than other cells, as it uses lots of energy sending the signals. Neurons are found in the brain, spinal cord and the whole central nervous system.

31. Meiosis. • Cell division for sexual reproduction. • Its like double mitosis, but with crossing over! Meiosis square dance

32. Early Prophase.

33. Late prophase.

34. Metaphase.

35. Anaphase.

36. Telophase.

37. Cytokinesis.

39. Meiosis Diploid – 2 copies of each chromosome (2n) Haploid – 1 copy of each chromosome (n)

41. Mitosis Meiosis Growth & repair Gamete production for sexual reproduction.

42. Mitosis Meiosis

43. Life Cycles http://www.bootslearningstore.com/ks4/repro.html

44. Variation in Humans

45. Continuous variation occurs where there is a range of values for a characteristic.Examples: height weight IQ hand span shoe size • Discrete (either/or) variation occurs where a characteristic, or trait is either present or absent.Examples: left/right handed attached/hanging earlobe long second toe double-jointed/not can/cannot roll tongue hitch-hikers’ thumb widow’s peak

46. Either/or variation

47. Continuous variation.

48. Our class

49. The Bell curve

50. Variation