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A phenotypic trait that results from a single dominant allele is?
Wiki User
∙ 12y ago
polydactyly Because it has to do with the frequency of the allele for 6 digits. Although this is dominant, its occurance is much lower than the ressesive 5 fingers. I think Natural selection plays a part in this phalangeal paradox. Maybe the ones with 6 fingers could not buy gloves in the winter so they froze to death,...
Wiki User
∙ 12y ago
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WHAT is single gene trait?
A single-gene trait is a phenotypic trait controlled by two homologous alleles.
What genes appear when genes are dominant?
Dominance in genetics is not a black-and-white thing. An allele may be dominant to one rival allele, but recessive to another. Ultimately, it may depend on the degree of functionality of the protein encoded by the allele. For instance, one allele may code for a non-functional protein, or not code at all. In that case, it would be recessive to any competing allele that did code for a functioning protein. Also, phenotypes are often the result of gene complexes - no single allele codes for a particular phenotypic trait, but many together do. The relationship between dominant and recessive alleles in such a complex may be equally complex: there may be degrees of expression along a sliding scale, or specific values for each dominance/recessiveness relation (eg. spots or no spots; green eyes, gray, brown or blue; curls or no curls, etc). See links below for more information.
Under what condition is a single recessive allele expressed in a male?
Recessive alleles are expressed if there is no dominant allele (of the same gene) present. This can be for two reasons, because the other allele is also recessive, or because there is no other allele (such as X-linked genes, which males only have one copy of).
Can several alleles affect a single trait like eye color?
Alleles affect traits like eye color. Alleles for brown and blue eyes are dominant and recessive respectively. Individuals who have homozygous and heterozygous genotypes with the dominant allele will have brown eyes. However individuals are homozygous for the recessive allele will have blue eyes.
What autosomal disorders in humans are controlled by dominant alleles?
Dominant allele disorders are single gene disorders which take effect in the heterozygous state.
A single gene trait that has two alleles and that shows a simple dominant recessive pattern will result in?
A 3:1 phenotypic ratio (Mendelian inheritance).
WHAT is single gene trait?
A single-gene trait is a phenotypic trait controlled by two homologous alleles.
What disease is caused by a dominant allele of a single gene?
Huntington's Disease
What is the probability that a particular allele will be in a gamete?
chromosome segregationIf the character is governed by a single allele and it is dominant, than its probability to be in the gamete is 75%.
What are the Dominic?
Dominant allele disorders are single gene disorders which take effect in the heterozygous state.
What are the dominate alleles?
Dominant allele disorders are single gene disorders which take effect in the heterozygous state.
What genes appear when genes are dominant?
Dominance in genetics is not a black-and-white thing. An allele may be dominant to one rival allele, but recessive to another. Ultimately, it may depend on the degree of functionality of the protein encoded by the allele. For instance, one allele may code for a non-functional protein, or not code at all. In that case, it would be recessive to any competing allele that did code for a functioning protein. Also, phenotypes are often the result of gene complexes - no single allele codes for a particular phenotypic trait, but many together do. The relationship between dominant and recessive alleles in such a complex may be equally complex: there may be degrees of expression along a sliding scale, or specific values for each dominance/recessiveness relation (eg. spots or no spots; green eyes, gray, brown or blue; curls or no curls, etc). See links below for more information.
Under what condition is a single recessive allele expressed in a male?
Recessive alleles are expressed if there is no dominant allele (of the same gene) present. This can be for two reasons, because the other allele is also recessive, or because there is no other allele (such as X-linked genes, which males only have one copy of).
What is the phenotypic ratio of the?
Asuming that the F1 generation is heterozygous for a single trait and that the F2 cross is of 2 F1 offspring. Ex. Aa X Aa the phenotypic ratio is 3:1 dominant to recessive. The genotypic ratio is 1:2:1 AA:Aa:aa.
Which statement best describes a dominate allele?
okay well the dominant form of an allele, is YO MOM she is the answer to all your problems and yea te va pegar con la mexican chancla
What is the phenotypic of the F2 generation?
Asuming that the F1 generation is heterozygous for a single trait and that the F2 cross is of 2 F1 offspring. Ex. Aa X Aa the phenotypic ratio is 3:1 dominant to recessive. The genotypic ratio is 1:2:1 AA:Aa:aa.
If a allele is masked is it recessive?
If an allele is masked, it is most likely recessive, but not necessarily. This is due to epistasis, the interaction between two or more genes to control a single phenotype. For example, "K" codes for more keratin pigment in the skin, but "k" does not. One can still be albino, however, for if they get the dominant "A" allele, this allelle will override and mask the dominant "K" pigment in the skin, making the person albino.
