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In genetics, dominance is the phenomenon of one variant of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome. [1] [2] The first variant is termed dominant and the second is called recessive.
Oct 12, 2024 · dominance, in genetics, greater influence by one of a pair of genes that affect the same inherited character. If an individual pea plant with the alleles T and t ( T = tallness, t = shortness) is the same height as a T T individual, the T allele (and the trait of tallness) is said to be completely dominant.
- The Editors of Encyclopaedia Britannica
6.5 Types of Dominance – Introduction to Genetics. As we discussed in the previous section on polygenic traits, in humans most characteristics do not fit into two different phenotypes — complex traits, e.g., height, hair texture, skin colour etc., seemingly do not follow Mendelian analysis.
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.
1 day ago · Dominant, as related to genetics, refers to the relationship between an observed trait and the two inherited versions of a gene related to that trait. Individuals inherit two versions of each gene, known as alleles, from each parent.
The terms dominant and recessive describe the inheritance patterns of certain traits. That is, they describe how likely it is for a certain phenotype to pass from parent offspring. Sexually reproducing species, including people and other animals, have two copies of each gene.
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As more scientists began analyzing genetic crosses using different types of plants and animals, it was found that while some traits obeyed Mendel’s laws (they were determined by a single gene with 1 dominant and 1 recessive allele), many other traits did not.
