recessiveness$67393$ - translation to ελληνικό
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recessiveness$67393$ - translation to ελληνικό

INHERITANCE PATTERN OF A GENE
Incomplete dominance; Dominant gene; Dominance Relationships; Recessive allele; Recessive trait; Autosomal dominant; Autosomal recessive; Autosomal recessive trait; Codominance; Recessiveness; Dominant alleles; Co-dominant expression; Dominant trait; Dominant negative; Co-dominance; Dominant allele; Codominant; Recessive genes; Dominant genes; Co-dominant; Dominant carrier; Homozygous dominant; Homozygous recessive; Genes, dominant; Genes, recessive; Autosomal-dominant disease; Autosomal dominant inheritance; Recessive gene; Incomplete Dominance; Recessive refuge; Dominant disease; Recessive (genetics); Autosomal recessive gene; Recessive characteristic; Dominance Relationship; Genetic dominance; Evolution of dominance; Dominant characteristics; Dominance relationship; Recessivity; Recessively; Autosomal recessive disorder; Autosomal dominant disorder; Genetical dominance; Partial dominance; Partial Dominance; Co-Dominance; Semidominant; Autosomal Recessive; Semidominance; Semi-dominance; Partial dominence; Autorecessive; Double recessive; Incompletely dominant; Genetically recessive; Genetically dominant; Incomplete dominant; Recessive; Dominance (genetic); Principle of Dominance; Autosomal dominant disorders; Autosomal recessive inheritance; Autosomal co-dominant; Autosomal dominance; Dominant and recessive genes; Recessive and dominant genes; Complete dominance; Dominant and recessive; Dominance and recessiveness; Mendelian recessive disorder; Dominant (genetics); Dominant-negative mutation; Recessive inheritance
  • A and B blood types]] in humans show co-dominance, but the O type is recessive to A and B.
  • 500px
  • Co-dominance in a [[Camellia]] cultivar
  • This Punnett square shows co-dominance. In this example a white bull (WW) mates with a red cow (RR), and their offspring exhibit co-dominance expressing both white and red hairs.
  • This [[Punnett square]] illustrates incomplete dominance. In this example, the red petal trait associated with the R [[allele]] recombines with the white petal trait of the r allele. The plant incompletely expresses the dominant trait (R) causing plants with the Rr genotype to express flowers with less red pigment resulting in pink flowers. The colors are not blended together, the dominant trait is just expressed less strongly.
  • Inheritance of dwarfing in maize. Demonstrating the heights of plants from the two parent variations and their F1 heterozygous hybrid (centre)

recessiveness      
n. απολυτίκιο

Ορισμός

recessive
A recessive gene produces a particular characteristic only if a person has two of these genes, one from each parent. Compare dominant
. (TECHNICAL)
Sickle-cell anaemia is passed on through a recessive gene.
ADJ: usu ADJ n

Βικιπαίδεια

Dominance (genetics)

In genetics, dominance is the phenomenon of one variant (allele) 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. The first variant is termed dominant and the second recessive. This state of having two different variants of the same gene on each chromosome is originally caused by a mutation in one of the genes, either new (de novo) or inherited. The terms autosomal dominant or autosomal recessive are used to describe gene variants on non-sex chromosomes (autosomes) and their associated traits, while those on sex chromosomes (allosomes) are termed X-linked dominant, X-linked recessive or Y-linked; these have an inheritance and presentation pattern that depends on the sex of both the parent and the child (see Sex linkage). Since there is only one copy of the Y chromosome, Y-linked traits cannot be dominant or recessive. Additionally, there are other forms of dominance such as incomplete dominance, in which a gene variant has a partial effect compared to when it is present on both chromosomes, and co-dominance, in which different variants on each chromosome both show their associated traits.

Dominance is a key concept in Mendelian inheritance and classical genetics. Letters and Punnett squares are used to demonstrate the principles of dominance in teaching, and the use of upper case letters for dominant alleles and lower case letters for recessive alleles is a widely followed convention. A classic example of dominance is the inheritance of seed shape in peas. Peas may be round, associated with allele R, or wrinkled, associated with allele r. In this case, three combinations of alleles (genotypes) are possible: RR, Rr, and rr. The RR (homozygous) individuals have round peas, and the rr (homozygous) individuals have wrinkled peas. In Rr (heterozygous) individuals, the R allele masks the presence of the r allele, so these individuals also have round peas. Thus, allele R is dominant over allele r, and allele r is recessive to allele R.

Dominance is not inherent to an allele or its traits (phenotype). It is a strictly relative effect between two alleles of a given gene of any function; one allele can be dominant over a second allele of the same gene, recessive to a third and co-dominant with a fourth. Additionally, one allele may be dominant for one trait but not others.

Dominance differs from epistasis, the phenomenon of an allele of one gene masking the effect of alleles of a different gene.