EasyBiologyHigh School (9–10)GeneralHeredity and Evolution › Heredity and InheritanceHeredity and Evolution › EvolutionNumerical
Sakshi surveys the 45 students of her class.
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Sakshi surveys the students of her class. She finds that have attached earlobes and the rest have free earlobes. How many have free earlobes? What percentage of the class is that?
Need a reminder? The key ideaShow
Heredity passes on a common basic design and small changes in it. DNA copying is never perfect, so asexual reproduction makes a little variation. Sexual reproduction mixes the DNA of two parents and makes far more. Variations build up over generations, and one that helps survival is more likely to be passed on.
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. Free earlobes. students.
Step 2. Percentage. .
Answer: students, which is of the class.
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