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Apr 27, 2017 · A dominant trait is an inherited characteristic that appears in an offspring if it is contributed from a parent through a dominant allele. Traits, also known as phenotypes, may include features such as eye color, hair color, immunity or susceptibility to certain diseases and facial features such as dimples and freckles.
Inheritance Example. With respect to eye color, the allele for brown eyes (B) is dominant, and the allele for blue eyes (b) is recessive. If a person receives dominant alleles from both parents (BB) she will have brown eyes. If she receives a dominant allele from one parent and a recessive gene from the other (Bb) she will also have brown eyes.
Dominant and recessive inheritance are useful concepts when it comes to predicting the probability of an individual inheriting certain phenotypes, especially genetic disorders. But the terms can be confusing when it comes to understanding how a gene specifies a trait.
Dec 20, 2023 · Dominant genes are those that are expressed or “seen” in an organism’s physical traits, even if only one copy of the gene is present. They are the genes that override or mask the effects of recessive genes if both are present.
Dec 20, 2023 · The dominant gene is the one that is expressed and determines the visible trait, while the recessive gene remains hidden. So how exactly do these dominant and recessive genes determine traits? It all comes down to inheritance. Each individual inherits two copies of every gene, one from each parent.
Mendel postulated that genes (characteristics) are inherited as pairs of alleles (traits) that behave in a dominant and recessive pattern. Alleles segregate into gametes such that each gamete is equally likely to receive either one of the two alleles present in a diploid individual.
The dominant/recessive character is a relationship between two alleles and must be determined by observation of the heterozygous phenotype. An example of a simple phenotype is the flower colour in Mendel’s peas.
