What is Dominant Traits _ It’s Meaning and Definition Dominant traits are those that are….
What is Dominant Traits _ It’s Meaning and Definition Dominant traits are those that are….
Contents [hide]
- 1
Dominant Traits – Meaning and Definition - 2
Definition: - 3
Meaning: - 4
Examples of Dominant Traits: - 5
Genotypic and Phenotypic Connection: - 6 Summary:
- 7 What is Dominant Traits _ It’s Meaning and Definition Dominant traits are those that are….
- 8 Understanding dominant and recessive traits.
- 9 Unit III – Genetic Principles and Molecular Processes
Dominant Traits – Meaning and Definition
Definition:
Dominant traits are those traits that are expressed or visible in an organism even if only one copy of the dominant allele is present.
These traits mask the effect of a recessive allele when both are present (i.e., in a heterozygous condition).
Meaning:
Every trait is controlled by genes, which come in pairs of alleles — one from each parent.
If one of the alleles is dominant, it will control the trait’s expression, even if the other allele is different (recessive).
In simple terms:
If an organism has one dominant allele, the dominant trait shows up.
Examples of Dominant Traits:
| Trait | Dominant Trait | Recessive Trait |
|---|---|---|
| Eye color (humans) | Brown eyes | Blue/green eyes |
| Height (pea plant) | Tall (T) | Short (t) |
| Hair type | Curly | Straight |
| Seed shape (pea) | Round (R) | Wrinkled (r) |
In a pea plant with Tt (Tall and short alleles), the plant will still be Tall, because Tall (T) is dominant.
Genotypic and Phenotypic Connection:
| Genotype | Phenotype (Trait Shown) |
|---|---|
| TT | Tall (dominant) |
| Tt | Tall (dominant) |
| tt | Short (recessive) |
Only tt shows the recessive trait.
TT and Tt both express the dominant trait.
Summary:
Dominant traits are traits that appear in an organism when at least one dominant allele is present.
They override the expression of recessive traits in heterozygous conditions and are a key concept in Mendelian genetics.
Would you like a diagram or Punnett square to help visualize this?
