Q1 of 33 Page 18

The number of chromosomes in a certain type of cell division is halved. This kind of cell division occurs in

The gametes are produced as a result of meiosis hence they have a haploid number of chromosomes. In sexually reproducing organisms, gametes formation takes place in reproductive organs i.e., ovary and testis. During meiosis, a diploid cell undergoes two successive division to produce gametes.

More from this chapter

All 33 →
1

Given below is a schematic diagram of a portion of DNA.


(a)How many strands are shown in the diagram?


(b) How many nucleotides have been shown in each strand?


(c) Name the parts numbered 1, 2, 3, 4 and 5 respectively.


(d) Name the DNA unit constituted by the parts 1, 2 and 3 collectively.

 2

The three sketches gave below (A, B and C) are intended to represent the replication of DNA. What should be their correct sequence starting with the first and ending with the last?

 2

In which one of the following options the two stages of mitosis have been given incorrect sequence?

 3

Synthesis phase in the cell cycle is called so for the synthesis of more of