Transcription of COMBINED SCIENCE: TRILOGY
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COMBINED SCIENCE: TRILOGY
*jun208464b2h01* IB/M/Jun20/E9 8464/B/2H For Examiner s Use Question Mark 1 2 3 4 5 6 7 TOTAL Monday 1 June 2020 Afternoon Time allowed: 1 hour 15 minutes Materials For this paper you must have: a ruler a scientific calculator. Instructions Use black ink or black ball-point pen. Pencil should only be used for drawing. Fill in the boxes at the top of this page. Answer all questions in the spaces provided. If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s). Do all rough work in this book. Cross through any work you do not want to be marked. In all calculations, show clearly how you work out your answer.
A gene is a small section of DNA on a chromosome. Complete the sentences. ... cells divide by meiosis to form gametes. Which . two. statements are true for cell division by meiosis? [2 marks] Tick ( ) two. ... Humans have 23 pairs of chromosomes in each body cell. One pair of chromosomes determines sex. 0 .5 1
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