CIE iGCSE Co-Ordinated Science B16.2 Cell division Exam Style Questions Paper 4
Question
(a) Fig. 7.1 summarises mitosis and meiosis in an organism.
(i) The parental cells in Fig. 7.1 have been drawn showing just four chromosomes. The actual number of chromosomes in each parental cell is 24.
Identify the actual number of chromosomes in:
cell A ………………………………….
cell B ………………………………….
(ii) Identify the name of the type of cells represented by cell B in Fig. 7.1.
…………………………………………………………………………………………………………………….
(iii) Describe the process occurring at stage 1 in Fig. 7.1.
…………………………………………………………………………………………………………………….
…………………………………………………………………………………………………………………….
(iv) State the name of the type of nucleus in the parental cell in Fig. 7.1.
…………………………………………………………………………………………………………………….
(v) Describe the arrangement of chromosomes in the parental cell in Fig. 7.1.
…………………………………………………………………………………………………………………….
(b) State two uses of mitosis.
1 ………………………………………………………………………………………………………………………………
2 ………………………………………………………………………………………………………………………………
▶️Answer/Explanation
Ans: 7(a)(i) 24 ;
12 ;
7(a)(ii) gamete(s) / sex (cell) / haploid (cell) ;
7(a)(iii) duplication / replication, of chromosomes ;
7(a)(iv) diploid ;
7(a)(v) paired ;
7(b) any two from:
growth ;
repair (of damaged tissues / cells) ;
replacement (of cells) ;
asexual reproduction ;