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According to the rule of dominance if two different alleles are present is the dominant allele expressed?
Wiki User
∙ 14y ago
the dominant allele is expressed when two (assuming you mean dominant and recessive) alleles are present.
however, if the alleles are codominant they are both expressed.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoThe dominant alleles are the ones that appear as capital letters and always show if they are there (R). Heterozygous is when there is a dominant and a recessive allele (Rr).
Wiki User
∙ 12y agoBoth unless it is codominance like in roan cattle that have a white and red dominant allele and turn on a reddish white.
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What is shared dominance?
Shared dominance, or co-dominance is when a single gene has more than one dominant allele. In shared dominance both alleles are expressed completely.
Allele that is always expressed if present?
An allele that is always expressed when it is present is the dominant allele.
What is a trait expressed when two different genes for the same trait present?
If the two different genes include one dominant allele and one recessive allele, which is the heterozygous genotype, the dominant phenotype is expressed. For example, if R represents the red flower allele and r represents the white flower allele, the flowers would be red. If the trait is governed by incomplete dominance, then the heterozygous genotype (Rr) will produce an intermediate phenotype, such as pink.
True or False In heterozygous individuals only the recessive allele is expressed?
In heterozygous individuals, only the dominant allele is expressed. The recessive allele is present, but not expressed
What kind of trait is expressed when two different genes from the same trait are present?
It depends on the gene in question, and the type of dominance of the trait.For monogenetic traits (those controlled by a single gene), the dominant trait(s) will be expressed when two different alleles are present.For example, if B leads to black fur and b leads to white fur:Complete dominance would result in a rabbit with Bb having black fur.Incomplete dominance - Bb would result in grey furCodominance - Bb would result in black and white patches/spots/etc.
What is the term for dominance in which the dominant allele is always expressed?
Complete dominance
At is a gene with two dominant alleles that are expressed at the same time?
Co-dominant or incomplete dominance situation.
What is shared dominance?
Shared dominance, or co-dominance is when a single gene has more than one dominant allele. In shared dominance both alleles are expressed completely.
What term describes a gene with two dominant alleles that are expressed at the same time?
Co-dominance.
What Allele expressed in homozygote?
A heterozygous individual has two different alleles. Depending on the type of dominance for the particular gene there are several different outcomes: If one allele is completely dominant over the other then this will be expressed. If they are codominant, then both will be expressed. The human blood type AB is an example of this - both A and B are expressed, neither is repressed by the other. Another possibility is incomplete dominance - where the phenotype (characteristic) is a mix of both (a trait in-between). For example a snap-dragon with red and white alleles will be pink.
Allele that is always expressed if present?
An allele that is always expressed when it is present is the dominant allele.
What is a trait expressed when two different genes for the same trait present?
If the two different genes include one dominant allele and one recessive allele, which is the heterozygous genotype, the dominant phenotype is expressed. For example, if R represents the red flower allele and r represents the white flower allele, the flowers would be red. If the trait is governed by incomplete dominance, then the heterozygous genotype (Rr) will produce an intermediate phenotype, such as pink.
Why you called co-dominance when a person possess two different alleles at the same locus and both alleles are expressed in the phenotype?
Both of the parent's alleles are either dominant or recessive.
True or False In heterozygous individuals only the recessive allele is expressed?
In heterozygous individuals, only the dominant allele is expressed. The recessive allele is present, but not expressed
What kind of trait is expressed when two different genes from the same trait are present?
It depends on the gene in question, and the type of dominance of the trait.For monogenetic traits (those controlled by a single gene), the dominant trait(s) will be expressed when two different alleles are present.For example, if B leads to black fur and b leads to white fur:Complete dominance would result in a rabbit with Bb having black fur.Incomplete dominance - Bb would result in grey furCodominance - Bb would result in black and white patches/spots/etc.
What Dominant alleles are both fully expressed in a phenotype?
The form of inheritance in which two (different) alleles are both expressed is called codominance. An example of codominance is the orange and black coat of a type of calico cat called a tortoiseshell. Both the orange allele and the black allele for coat color are expressed.
What is meant by dominance and recessiveness?
First of all alleles code for different traits all across an organism. Simply looking at it, a dominant allele is a trait that essentially "dominates" or is expressed over a recessive allele. In theory every organism (that is not asexual) receives one allele from its father and one allele from its mother. If both of these alleles are dominant (homozygous dominant) than the dominant trait is expressed, if one is dominant and one is recessive (heterozygous) than still the dominant trait is expressed. However, if the alleles for both traits are recessive (homozygous recessive) than the recessive trait will be expressed.
