Assuming that in sheep, the allele for black coat colour is dominant over that for brown coat colour. Crossing a heterozygote black with a homozygote brown will produce?
A. 100% brown coat coloured offspring B. 75% brown coat coloured offspring C. 50% brown coat coloured offspring D. 25% brown coat coloured offspring Correct Answer: Option C – 50% brown coat coloured offspring
Assuming that in sheep, the allele for black coat colour is dominant over that for brown coat colour. What percentage of the F generation will have black colour when two heterozygotes are crossed?
A. 100% B. 75% C. 50% D. 25% Correct Answer: Option B 75%
Biological methods of weed control do not include?
A. introducing insects to control weeds B. planting crops to compete with the weeds C. planting leguminous cover crops D. uprooting the weeds Correct Answer: Option D – uprooting the weeds
The side effects of the various preventive and control measures of pests and diseases of crops include the following except?
A. improved quality of farm produce B. environmental pollution C. poisoning of wildlife D. disruption of the ecosystem Correct Answer: Option A – improved quality of farm produceProducts
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