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One gene copy from each parent
Age 14 · Biology
Every living thing gets one copy of each gene from each parent, so it has two versions of every trait. When the two versions are different, the dominant one shows and the recessive one stays hidden, but it can still be passed on.
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In the picture
- Parent plant with purple flowers: it carries two purple versions of the flower-color gene.
- Parent plant with white flowers: it carries two white versions of that gene.
- The offspring gets one version from each parent, one purple and one white.
- The offspring has purple flowers because the purple version is dominant and hides the white one.
Examples
- Two black Labrador dogs can have a yellow puppy if both carry a hidden version of the gene for yellow.
- A child can have curly hair like their mother and a nose shape like their father.
Key takeaways
- Each parent passes on only one of its two versions of a gene.
- A dominant version hides a recessive one, but the recessive version still gets passed on.
Quiz: One gene copy from each parent (Age 14)
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How many versions of each gene does a living thing inherit, and where do they come from?
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A guinea pig inherits a black-fur version of a gene from one parent and a brown-fur version from the other. Black is dominant. What color is its fur?
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A plant shows the dominant trait but also carries a hidden recessive version. What happens to that recessive version?
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