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.

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:

1. Brown Eye Color (B) – Overpowers blue (b) or green eye color.

2. Curly Hair (C) – Dominant over straight hair (c).

3. Widow’s Peak (W) – A V-shaped hairline is dominant over a straight hairline.

4. Freckles (F) – Presence of freckles is a dominant trait.

5. Dimples (D) – If at least one parent has dimples (Dd or DD), the child may also have them.

Dominant vs. Recessive Traits:

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

Dominant Traits – Meaning and Definition

Definition:

Dominant traits are those inherited characteristics that are expressed (visible) in an organism even if only one copy of the gene is present.

Meaning in Simple Terms:

Dominant traits are the traits that “show up” in a person even if the person has only one dominant gene (from one parent). They “dominate” over the other type of gene (called recessive) when both are present.

Genetics Example:

Let’s say:

• B = dominant gene (for brown eyes)

• b = recessive gene (for blue eyes)

Then:

• BB = brown eyes

• Bb = brown eyes (dominant gene still shows)

• bb = blue eyes (only when no dominant gene is present)

Key Characteristics of Dominant Traits:

• Expressed with only one dominant allele (capital letter, e.g., A)

• Can mask the effect of a recessive trait

• Commonly seen in Mendelian genetics

• Passed from either parent

Examples of Dominant Traits in Humans:

Summary:

Dominant traits are those genetic traits that are visibly expressed when at least one dominant allele is present. They overpower or hide recessive traits in mixed genetic combinations.

Let me know if you’d like a diagram or explanation using Punnett squares to see how dominant and recessive traits are inherited.

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

family traits (i) dominant and recessive traits

Principles of Inheritance and Variation.pmd