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Organisms grow and develop according to specific instructions coded for by their genes. These genes provide instructions that will direct cellular growth and development, ensuring that a species’ young (Figure 1.4) will grow up to exhibit many of the same characteristics as its parents.
![media/image5.png](http://www.opentextbooks.org.hk/system/files/resource/34/34471/34495/media/image5.png)
Figure 1.4
Although no two look alike, these kittens have inherited genes from both parents and share many of the same characteristics.
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