An organism which has two different alleles of the gene is called heterozygous. Phenotypes (the expressed characteristics) associated with a certain allele can sometimes be dominant or recessive, but often they are neither.
What is the phenotype when two different alleles are inherited together?
If the alleles are different, the dominant allele usually will be expressed, while the effect of the other allele, called recessive, is masked. In codominance, however, neither allele is recessive and the phenotypes of both alleles are expressed.
How many phenotypes are possible with 2 alleles?
With two loci and two alleles in a strictly additive model (i.e., no epistasis or other modifying effects) we can have five phenotypic classes aabb<Aabb=aaBb<AaBb=AAbb=aaBB<AABb=AaBB<AABB and the intermediate phenotypic values can be produced in more ways, so should be more frequent.
How do different alleles produce different phenotypes?
Alleles produce phenotypes (or physical versions of a trait) that are either dominant or recessive. The dominance or recessivity associated with a particular allele is the result of masking, by which a dominant phenotype hides a recessive phenotype.
What are the two phenotypes?
For the pea plants, if the red allele is dominant and the white allele is recessive, only two phenotypes are possible. Both the plants with red-red and red-white genotypes will have the red phenotype, while the plants with the white-white genotype will have the white phenotype.
When the phenotypes controlled by two alleles are equally displayed in the heterozygote the two alleles are said to show?
Codominance pertains to the genetic phenomenon in which gene products from the two alleles in a heterozygote are produced in roughly equal amount, where gene products refer to either different transcripts from the two alleles, different proteins from cellular processing of the transcripts, or different metabolites …
Can two organisms have different phenotypes but the same genotype?
Can organisms with different genotypes have the same phenotypes? … The answer is yes, two different genotypes can result in the same phenotype. Remember, the recessive phenotype will be expressed only when the dominant allele is absent, or when an individual is homozygous recessive (tt) (Figure below).
How many different phenotypes are possible?
There are three common alleles in the ABO system. These alleles segregate and assort into six genotypes, as shown in Table 1. As Table 1 indicates, only four phenotypes result from the six possible ABO genotypes.
How many phenotypes are possible?
A fetus receives one of these three alleles from each of its parents. This produces four possible phenotypes (blood types) and six possible genotypes.
When both alleles are expressed equally in the phenotype of the heterozygotes?
Codominance occurs when both alleles are expressed equally in the phenotype of the heterozygote. The red and white flower in the figure has codominant alleles for red petals and white petals. Codominance.
What word means a person received two different alleles?
If the two alleles are the same, the individual is homozygous for that gene. If the alleles are different, the individual is heterozygous.
Are phenotypes and alleles the same?
Alleles contribute to the organism’s phenotype, which is the outward appearance of the organism. Some alleles are dominant or recessive. When an organism is heterozygous at a specific locus and carries one dominant and one recessive allele, the organism will express the dominant phenotype.
What is different between two alleles of the same gene quizlet?
What is different between two alleles of the same gene? The information they carry. For example, one allele might carry the information for blue eye pigment, while the other carries the information for brown eye pigment. Define Mendel’s law of independent assortment.
What is phenotype example?
The term “phenotype” refers to the observable physical properties of an organism; these include the organism’s appearance, development, and behavior. … Examples of phenotypes include height, wing length, and hair color.
What are 3 examples of phenotypes?
- Eye color.
- Hair color.
- Sound of your voice.
- Certain types of disease.
- Size of a bird’s beak.
- Length of a fox’s tail.
- Color of the stripes on a cat.
What are human phenotypes?
A phenotype is an individual’s observable traits, such as height, eye color, and blood type. The genetic contribution to the phenotype is called the genotype. Some traits are largely determined by the genotype, while other traits are largely determined by environmental factors.