What is Dominant Traits _ It’s Meaning and Definition Dominant traits are those that are.

Diznr International

2 months ago

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Contents

1 Dominant Traits: Meaning and Definition
2 Key Characteristics of Dominant Traits:
3 Examples of Dominant Traits in Humans:
4 Dominant vs. Recessive Traits:

Dominant Traits: Meaning and Definition

Dominant traits are those that are expressed in an organism even if only one copy of the dominant allele is present in the genotype. These traits appear when an individual has at least one dominant allele (AA or Aa) in their genetic makeup.

Key Characteristics of Dominant Traits:

They are controlled by dominant alleles, represented by capital letters (e.g., A, B, D).
A dominant trait is expressed in both homozygous dominant (AA) and heterozygous (Aa) conditions.
They mask the effect of recessive traits (which only appear when both alleles are recessive, i.e., aa).

Examples of Dominant Traits in Humans:

Brown Eye Color (B) – Overpowers blue (b) or green eye color.
Curly Hair (C) – Dominant over straight hair (c).
Widow’s Peak (W) – A V-shaped hairline is dominant over a straight hairline.
Freckles (F) – Presence of freckles is a dominant trait.
Dimples (D) – If at least one parent has dimples (Dd or DD), the child may also have them.

Dominant vs. Recessive Traits:

Feature	Dominant Trait	Recessive Trait
Expression	Requires at least one dominant allele (AA or Aa)	Requires two recessive alleles (aa)
Symbol	Represented by a capital letter (A, B, D)	Represented by a lowercase letter (a, b, d)
Example	Brown eyes (BB or Bb)	Blue eyes (bb)

Would you like a Punnett square example to better understand dominant vs. recessive inheritance?