Q11 of 50 Page 5

" All organisms have even number of chromosomes." Why?

All organisms have even number of chromosomes because all organisms have chromosomes in homologous pairs where one member of the pair is contributed from each of the parent.

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9 What are homologous chromosomes? 10 What is the significance of mitosis? 12 State the relationship between meiosis and fertilization. 13 Which type of cell division is responsible for regeneration of tail in a lizard?