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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.
Oct 12, 2024 · Dominance, in genetics, greater influence by one of a pair of alleles that affect the same inherited character. In ecology, the term dominance refers to a species of animal or plant that exerts the most influence on other species of its community because its members are the most abundant or the largest.
- The Editors of Encyclopaedia Britannica
3 days ago · A dominant gene, or a dominant version of a gene, is a particular variant of a gene, which for a variety of reasons, expresses itself more strongly all by itself than any other version of the gene which the person is carrying, and, in this case, the recessive.
When a dominant allele is paired with a recessive allele, the dominant allele determines the characteristic. When these traits or characteristics are visibly expressed, they are known as phenotypes. The genetic code behind a trait is known as the genotype.
Explain the relationship between genotypes and phenotypes in dominant and recessive gene systems. Use a Punnett square to calculate the expected proportions of genotypes and phenotypes in a monohybrid cross. Explain Mendel’s law of segregation in terms of genetics and the events of meiosis.
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.
An example of co-dominance is found within the ABO blood group of humans. The ABO gene has three common alleles that were named (for historical reasons) I A, I B, and i. People homozygous for I A or I B display only A or B type antigens, respectively, on the surface of their blood cells, and therefore, have either type A or type B blood (Figure ...
