In a lab culture, about 1 in 500 new cells carries a small change in its DNA…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
In a lab culture, about in new cells carries a small change in its DNA. Neha counts new cells under the microscope. About how many of them carry a change? About how many are copies with no change?
Need a reminder? The key ideaShow
Reproduction makes new individuals of the same kind. Its basic event is the copying of DNA, which is never perfect, so the copies differ a little. These variations help a species to survive when its niche changes.
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. With a change. cells.
Step 2. With no change. cells.
Answer: about cells carry a change, and about do not.
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