Question

Identify the true statements –

I. Pullorum disease of poultry is caused by virus.

II. Drones are produced by parthenogenesis.

III. Heterosis or hybrid vigour is the phenotypic superiority of the hybrid over either of its parents in one or more traits.

IV. A clone contains and expresses genetically engineered gene known as transgene.

V. Cross breeding is practised to develop homozygous pureline.

• A. I, IV and V
• B. II and III
• C. All
• D. None

Answer 1

Answer: (B)

II and III