MediumBiologyHigh School (9–10)GeneralBiology in Human Welfare › Improvement in Food ResourcesConceptual
Meena can choose between a Jersey cow and a Red Sindhi cow…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Meena can choose between a Jersey cow and a Red Sindhi cow. The Jersey gives milk for a long lactation but falls ill easily in the local heat. The Red Sindhi resists disease but gives milk for a short time. What should Meena do to get the best cattle, and why?
Need a reminder? The key ideaShow
Animal husbandry is the scientific management of livestock. Milch animals give milk and draught animals do farm work; the cow is Bos indicus and the buffalo is Bos bubalis. The milk in one lactation is the milk of a day times the days. Exotic breeds give a long lactation; local breeds resist disease.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. The good points. The Jersey is an exotic breed with a long lactation. The Red Sindhi is a local breed with resistance to disease.
Step 2. The plan. She should cross the two breeds.
Step 3. The reason. The cross-bred calves can have a long lactation and also resist disease, so they give more milk and stay healthy.
Answer: cross the exotic and the local breed, to get cattle with both a long lactation and resistance to disease.
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