A recessive allele is expressed only when two copies of it are present.
From the learning.blogs.nytimes.com
Two members of the new colony shared the recessive allele for Ellis-van Creveld syndrome.
From the en.wikipedia.org
Assign one color as the dominant allele TLG and the other color as the recessive allele tlg.
From the learning.blogs.nytimes.com
The recessive allele is present but its expression is hidden.
From the en.wikipedia.org
Two of the founders of the colony in Pennsylvania carried the recessive allele for Ellis-van Creveld syndrome.
From the en.wikipedia.org
Domestic chickens with yellow skin are homozygous for a recessive allele, and white skinned chickens carry the dominant allele.
From the scienceblogs.com
Several genetic studies have concluded nectarines are created due to a recessive allele, whereas a fuzzy peach skin is dominant.
From the en.wikipedia.org
The expected time to fixation of this recessive allele due to genetic drift alone ranged from about 1,100 years to about 100,000 years.
From the en.wikipedia.org
If one allele overrides the instructions from another, it is called the dominant allele, and the allele that is overridden is called the recessive allele.