0
What is a pair of nonidentical alleles affecting two phenotypes for a given trait are both expressed at same time in heterozygotes?
Wiki User
∙ 11y ago
Co-dominance.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
How is codominance an exception to the laws of genetics proposed by Mendel?
Its an exception because both of the alleles are expressed in heterozygotes.
How differences in genotypes cause variations in phenotypes?
Phenotypes are the traits expressed by the genotype. So, for blood type, a person can have A and i alleles (genotype). However, in the phenotype, since i is recessive, only the A will be expressed, and the person will have an A blood type.
How do you know that a pea plant with wrinkled seeds does not have one copy of the round seed allele?
The trait associated with the allele is not expressed in heterozygotes.
Is one blood group more dominant than another?
Genotypes, Phenotypes, and frequencies in the ABO blood-typing systemGenotype Blood Type A Antigen present B Antigen Present Frequency exampleIAIA or IAi A + - 41IBIB or IBi B - + 11IAIB AB + + 4ii O - - 44Among the six possible genotypes, there are four distinguishable phenotypes- the A,B,AB and O blood types. In this system, the IA and IB alleles are codominan, since each is expressed equally in the IA IB heterozygotes, and the i allele is recessive to both the IA IBalleles.Principles of Gentics Snustad.Simmons
Why phenotypes don't always express its entire genotype?
Phenotypes are the entirety of the observable traits. Genotypes are the instructions in the genetic code. Dominant alleles override the recessive alleles, making only the dominant alleles expressed.
Dominant alleles are so called because under most circumstances they?
are phenotypically expressed. They are expressed in homozygous form and in heterozygotes with the recessive allele. Recessive alleles are only phenotypically expressed in homozygous form. Consider two alleles for flower color, A and a, where A is dominant and expressed as red, and a is recessive and expressed as white. There are only three diploid genotypes possible for these alleles: AA Aa and aa.However, because A is dominant, the following phenotypes will be expressed for the following genotypes:AA: redAa: redaa: white
What is hidden in the heterozyotes?
Heterozygotes have two different alleles for a particular gene, where one allele is dominant and the other is recessive. The recessive allele is "hidden" in heterozygotes because it is not expressed phenotypically but can be passed on to offspring.
How is codominance an exception to the laws of genetics proposed by Mendel?
Its an exception because both of the alleles are expressed in heterozygotes.
How is phenotype expressed in a incomplete dominance?
It's expressed when a heterozygous phenotype is between two homozygous phenotypes.
How differences in genotypes cause variations in phenotypes?
Phenotypes are the traits expressed by the genotype. So, for blood type, a person can have A and i alleles (genotype). However, in the phenotype, since i is recessive, only the A will be expressed, and the person will have an A blood type.
How do you know that a pea plant with wrinkled seeds does not have one copy of the round seed allele?
The trait associated with the allele is not expressed in heterozygotes.
How are sex-linked genes expressed differently in the phenotypes of male and female?
i don't have any idea
Is one blood group more dominant than another?
Genotypes, Phenotypes, and frequencies in the ABO blood-typing systemGenotype Blood Type A Antigen present B Antigen Present Frequency exampleIAIA or IAi A + - 41IBIB or IBi B - + 11IAIB AB + + 4ii O - - 44Among the six possible genotypes, there are four distinguishable phenotypes- the A,B,AB and O blood types. In this system, the IA and IB alleles are codominan, since each is expressed equally in the IA IB heterozygotes, and the i allele is recessive to both the IA IBalleles.Principles of Gentics Snustad.Simmons
Why phenotypes don't always express its entire genotype?
Phenotypes are the entirety of the observable traits. Genotypes are the instructions in the genetic code. Dominant alleles override the recessive alleles, making only the dominant alleles expressed.
How are Genotype phenotype different?
Phenotypes are the traits expressed by the genotype. So, for blood type, a person can have A and i alleles (genotype). However, in the phenotype, since i is recessive, only the A will be expressed, and the person will have an A blood type.
Is it impossible for two alleles to produce four phenotypes?
This would depend upon how they are expressed. Are we talking dominant, codominant, or recessive? Then there are genes thought to be fine tuned by environmental factors.
The distribution of phenotypes for a typical polygenic trait can often be expressed as?
A bell shaped curve often describes the distribution of phenotypic classes of a polygenic trait.
