Understanding Dominant and Recessive Traits – Clear Differences
In genetics, traits passed from parents to offspring are determined by genes. These genes can be either dominant or recessive.
Understanding the difference between dominant and recessive traits helps explain why we inherit certain characteristics from our parents. Let’s learn more about each term clearly and separately.
Dominant Trait
A dominant trait is a characteristic expressed when at least one dominant gene (allele) is present. Dominant traits overpower recessive traits and are usually represented by a capital letter (e.g., "B").
What is a Recessive Trait?
A recessive trait is expressed only when two recessive alleles are inherited, one from each parent. If paired with a dominant allele, the recessive trait is hidden.
Key Differences – Dominant Vs Recessive
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FAQs on Difference Between Dominant and Recessive |NEET
1. What is the main difference between dominant and recessive traits?
Dominant traits appear even with one dominant gene, whereas recessive traits require two recessive genes to appear.
2. Can recessive traits skip generations?
Yes, recessive traits often skip generations, becoming visible only when two recessive genes combine.
3. Is curly hair dominant or recessive?
Curly hair is generally considered a dominant trait.
4. How are dominant traits represented in genetics?
Dominant traits are represented by uppercase letters (e.g., A, B).
5. Why are recessive traits less common than dominant traits?
Recessive traits appear less often as they require two recessive alleles to show, whereas dominant traits need only one.
6. Can two parents with dominant traits have a child with recessive traits?
Yes, if both parents carry a hidden recessive gene, their child can inherit it and show the recessive trait.
7. What is an example of a recessive genetic disorder?
Examples include cystic fibrosis and sickle cell anemia, both caused by recessive genes.
7. What are examples of dominant traits in humans?
Examples include brown eyes, curly hair, and having dimples.
8. Are dominant traits always beneficial?
No, dominant traits aren’t always beneficial. Some dominant genes can also cause genetic disorders.
10. Can recessive traits become dominant over time?
No, dominance and recessiveness are fixed by genes, and a recessive trait cannot become dominant spontaneously, but frequency may vary due to selection or chance.
