In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

[Q]: The earliest clear statement of how chromosomes may spread in a population not because of their positive fitness effects on the individual organism , but because of their own " parasitic " nature came from the Swedish botanist and cytogeneticist Gunnar O ̈ stergren in 1945 .
[A]: The Swedish botanist and cytogeneticist Gunnar O ̈ stergren in 1945 noted how chromosomes may spread in a population because of their own ” parasitic ” nature .


[Q]: For example , " Koopa 's Tycoon Town " involves players investing coins into hotels ( as in " Monopoly " ) in order to earn stars , with each hotel only providing stars to the player with the highest current investment .
[A]: For example , in " Koopa 's Tycoon Town , " players get stars by putting coins into hotels ( like " Monopoly " ) .


[Q]: He had devoted his enormous energies to the destruction of what Republicans called the Slave Power , that is the efforts of slave owners to take control of the federal government and ensure the survival and expansion of slavery .
[A]:
He had devoted his enormous energies to the destruction of what Republicans called the " Slave Power " .