Solutions to these questions can be found here. 1) The diagram below models the process of meiosis. Describe the process that accounts for the changes shown in the model during interphase. (2 marks) 2) Explain the structure and behaviour of chromosomes in the first division of meiosis. Include detailed reference to the model above. (5 marks) 3) A zebronkey hybrid is the result of crossing a male zebra which has 44 chromosomes with a female donkey which has 62 chromosomes. How many chromosomes will the zebronkey have? A) 53 B) 75 C) 84 D) 106 4) Three genes are arranged along a homologous pair of chromosomes as shown. a) What is the individual’s genotype before crossing over occurs? (1 mark) b) Label, on the diagram below, the alleles after crossing over has occurred. (1 mark) c) Explain the effect of independent assortment of chromosomes on the genotype of the offspring. (2 marks)
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