Short answer questions VII — task. Science CBSE, Class 10.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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Give two reasons for the appearance of variations among the progeny formed by sexual reproduction.

a. During meiosis ___________.

Crossing over involves the exchange of DNA between homologous chromosomes, which results in variation in the progeny
The progeny has no variation because crossing over does not involve DNA exchange between homologous chromosomes

b. Which of the following statement is about the variation in sexual reproduction?

The progeny, produced through sexual reproduction, differs because it contains traits from the mother and the father
The offspring formed through sexual reproduction is the same because it only possesses maternal characteristics

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