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I am reading the book Humankind Emerging for my course at university. We have to get to grips with mitosis and meiosis, Genes DNA, and RNA. I just can't get my head around it, apparently they crossover. I have never done anything like this before.. so can someone explain it as simply as they possibly can.
Three dolls have height ratio of 7:6:4, if the middle one is 9 Cm in height, what are the heights of others?? how to work this out?