MCQ
The phenotypic ratio of F2 generation is ____________?
- A1 : 2 : 1
- B3 : 1
- C2 : 2
- D2 : 1 : 1
Explanation:
The ratio of the phenotypes is 3 : 1, typical for a monohybrid cross. Therefore, (b) is the correct answer.

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$I.$ Eco. $RI$ restriction endonuclease enzyme is isolated from Escherichia coli $RY13$
$II.$ Its recognition sequence is $5^{\prime}-$ $GAATTC - 3 '$
$3^{\prime}-C T T A A G-5^{\prime}$
$5^{\prime}-G-A-A-T-T-C-3^{\prime}$
$3^{\prime}-C-T-T-A-A-G-5^{\prime}$
$III.$ Its site of cleavage is