![]() One copy comes from mom and the other from dad. People (and many plants) have two copies of most genes. And so on for most traits for every living thing. A plant might have a gene that decides what color its flowers will be. For example, people have a gene that determines their blood type, and another gene that determines if they have red hair or not. ( Wikipedia, Pixabay ) Genes Cause TraitsĪ gene is like a set of instructions for making a certain trait. ![]() Pink flowers are a classic example of incomplete dominance. Red hair is a classic example of a recessive trait. Here, the child has both traits from their parents at the same time. A parent with A blood type and a parent with B blood type can have a child with AB blood type. A great example of this is when a plant with red flowers is paired with a plant with white flowers and the seeds give plants with pink flowers.įinally, there are examples when the child ends up with both parents’ traits. This situation is called incomplete dominance. When one parent has red hair and the other doesn’t, sometimes none of their kids end up with red hair! In this case, one trait is said to be dominant over the other recessive one. Sometimes when two parents with different traits have kids, all the kids end up with only one parent’s trait even though the children inherited both. And then finally, we’ll tackle the why of your question! There Are Different Kinds of Traits Then, we’ll review how genes cause traits. And how differences in genes affect those traits.īefore we go into the why, let’s back up and go over different kinds of traits. Great question! The answer has to do with how different genes work to give traits.
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