Note: the only way the recessive trait shows-up in the phenotype is if the geneotype has lowercase . A is by definition equal to p, so the answer is. Summary Deleterious recessive alleles that are masked in outbred. Different versions of the same gene are called alleles and can cause variation. A recessive allele is only expressed (influences the characteristics of the dog) if .
Mendel studied seven traits in pea plants that each had two alleles , one dominant and one recessive. Generally, the dominant allele is . At the same time, the person would be considered a carrier of the recessive allele , meaning that the blue eye allele could be passed to offspring even if that . If the alleles are different, the dominant allele usually will be expresse while the effect of the other allele , called recessive , is masked. In codominance, however . Learn the difference between dominant alleles and recessive alleles.
In some traits, however, alleles may be codominant—i.
An example is the human ABO blood group . When a trait is recessive, an individual must have two copies of a recessive allele to express the trait.
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