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Biology genetics hw Due: 26th November 2013 What the letters DNA stand for (d) Name: ………………………………………… During mitosis the cell splits in ……..after copying all the DNA (h) There are 23 pairs of these in most human cells (c) Part of the cell where chromosomes are found (n) Type of cell division used to repair cells or grow new cells (m) One of these is made from many thousands of different genes (c) Sperm and/ or egg cells (g) Man who first recorded the pattern in which traits are passed between generations (M) Small section of DNA that codes for a particular trait or characteristic (g) 2 reasons Mendel’s work was not recognised til after his death. How DNA is used to work out paternity disputes and solve crimes (DNA f) Type of plants used by Mendel in his experiments (p) The structure of DNA is a double…. (h) Mendel’s “inherited factors” are now called ………….. / ………….. (g / c) The type of molecule which is built using the DNA code as instructions (p) Part of the cell which uses the DNA code to build proteins (r) Type of cell that only has 23 single chromosomes, instead of 23 pairs (g) The 2 cells formed from mitosis are genetically ………….. (i) During mitosis all the DNA inside a cell is ……………… (c) 2 reasons scientists may be asked to produce a DNA fingerprint (20 marks) When scientists look at dividing cells under a microscope, they can see strands that contain a chemical called DNA. A photograph of these strands can be cut up and re-arranged. The diagram shows an arrangement of the strands from a human cell. 1. What name is given to the strands containing DNA shown in the diagram? alleles chromosomes genes 2. How can you tell from the diagram that the cell was taken from a man not a woman? 3. How can you tell from the diagram that the strands are from a body cell and not from a gamete? 3. Which part of the cell would these strands have been found in? Lexie Munro 2013 (4 marks) Total………………. (max 24 + 5 for stretch) Due: 26th November 2013 Biology genetics hw Name: ………………………………………… STRETCH Explain why every cell in your body has identical DNA. You may want to include some of these words in your answer Mitosis copies splits chromosomes growth (5 marks) Lexie Munro 2013 Total………………. (max 24 + 5 for stretch)