What are recessive and dominant traits?
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Answer:
Dominant and recessive traits exist when a trait has two different forms at the gene level. The trait that first appears or is visibly expressed in the organism is called the dominant trait. The trait that is present at the gene level but is masked and does not show itself in the organism is called the recessive trait.
Explanation:
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Dominant and recessive traits exist when a trait has two different forms at the gene level.
Dominant Traits
The trait that first appears or is visibly expressed in the organism is called the dominant trait.
For eg. Curly hair is dominant over straight hair. Baldness is a dominant trait. Having a widow's peak (a V-shaped hairline) is dominant over having a straight hairline. Freckles, cleft chin and dimples are all examples of a dominant trait.
Recessive Traits
The trait that is present at the gene level but is masked and does not show itself in the organism is called the recessive trait.
For eg.
- Attached earlobes.
- Inability to roll tongue.
- Five fingers.
- Type O Blood.
- Hitch-hiker's thumb.
- Blue eyes.
- Albinism: an albino lacks pigment or coloration in the skin.
- Sickle cell anemia: abnormal red blood cells make it difficult to transport oxygen throughout the body.
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