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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.
Dec 20, 2023 · Gene dominance refers to the phenomenon where one allele, known as the dominant allele, masks the expression of another allele, known as the recessive allele, in a pair. To understand the concept of gene dominance, it is essential to grasp what a dominant gene is and how it influences traits.
In this example, we will call the gene for cleft chin “B,” and the gene for smooth chin “b.” Cleft chin is a dominant trait, which means that having the dominant allele either from one parent (Bb) or both parents (BB) will always result in the phenotype associated with the dominant allele.
In this example, we will call the gene for cleft chin “B,” and the gene for smooth chin “b.” Cleft chin is a dominant trait, which means that having the dominant allele either from one parent (Bb) or both parents (BB) will always result in the phenotype associated with the dominant allele.
Oct 29, 2024 · An example is the AB blood type in humans, where both A and B alleles contribute to the phenotype. 4. Non-Mendelian Patterns. Epistasis: One gene can interfere with or modify the expression of another gene, such as in coat color patterns in animals where one gene can mask others. Pleiotropy: A single gene affects multiple traits. For example ...
The gene that produces healthy, round-shaped red blood cells is dominant. The recessive gene causes an abnormality in the shape of red blood cells; they take on a sickle form, which can clog the veins and deprive vital organs of oxygen, increasing the risk of stroke.
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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.
