10.Biotechnology and its Application
medium

Some of the characteristics of $Bt$ cotton are

A

long fibre and resistance to aphids

B

medium yield, long fibre and resistance to beetle pests

C

high yield and production of toxic protein crystals which kill dipteran pests

D

high yield and resistance to bollworms.

(AIPMT-2010)

Solution

(d) : $Bt$ toxin genes were isolated from Bacillus thuringiensis and incorporated into cotton plant. The genetically modified crop is called $Bt$ cotton. $Bt$ cotton has the following useful characteristics: pest resistance, herbicide tolerance, high yield and resistance to bollworm infestation.

Standard 12
Biology

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