Q2 of 49 Page 7

Do all the gametes formed from a parent organism have the same genetic composition (identical DNA copies of the parental genome)? Analyse the situation with the background of gametogenesis and provide or give suitable explanation.

The gametes formed from a parent organism do not have the same genetic composition (identical DNA copies of the parental genome) because in sexual reproduction the fusion of male and female gamete takes place. The male gamete has different genetic makeup and female gamete has different genetic makeup their recombination leads to the formation of a gamete that has different DNA composition.


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11

Justify the statement ‘Vegetative reproduction is also a type of asexual reproduction’.

 1

Enumerate the differences between asexual and sexual reproduction. Describe the types of asexual reproduction exhibited by unicellular organisms.

 3

Although sexual reproduction is a long drawn, energy-intensive complex form of reproduction, many groups of organisms in Kingdom Animalia and Plantae prefer this mode of reproduction. Give at least three reasons for this.

 4

Differentiate between (a) oestrus and menstrual cycles; (b) ovipary and vivipary. Cite an example for each type.