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Solution


Q.

Read the passage given below and answer the following questions from (i) to (v).

Sexual reproduction is a method to give rise to one’s progeny. In higher animals, male and female gametes are produced by different individuals to carry out sexual reproduction. Such individuals are said to be unisexual. However, in some animals like flatworm, earthworm, leech, and hydra both male and female gametes are produced by the same individual. Such organisms are said to be hermaphrodites or bisexual. Male and female gametes fertilise to form a zygote that has trail of characters from both the parents.

 

 (v) The number of chromosomes present in parents and offspring of a particular species remains constant due to ________.
1 doubling of chromosomes during zygote formation  
2 halving of chromosomes during gamete formation  
3 doubling of chromosomes after gamete formation  
4 halving of chromosomes after gamete formation  

Ans.

(2)