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What is the term for an allele that is not expressed in the phenotype of a heterozygous individual?
incomplete dominance
source: PH Bio textbook
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How many alleles are there in codominance?
In codominance, there are at least two alleles contributing to the phenotype of an individual, each allele independently expressed. This means that both alleles are fully expressed in the heterozygous genotype, resulting in a distinct phenotype.
When is a recessive allele for a trait expressed in the phenotype of an dividual?
A recessive allele for a trait is expressed in the phenotype of an individual only when the individual is homozygous for that allele, meaning it has two copies of the recessive allele (one from each parent). If the individual has at least one dominant allele for that trait, the dominant trait will be expressed instead. Therefore, the presence of the recessive phenotype is only visible when both alleles are recessive.
If Genotype of a G as dominate green and g for recessive yellow what would the heterozygous look like?
The heterozygous genotype would be Gg. This means the individual has one dominant green allele (G) and one recessive yellow allele (g). The dominant trait (green in this case) would be expressed in the phenotype of the individual.
What are the circumstances under which dominant alleles will be expressed?
Dominant alleles are expressed when an individual has at least one copy of the dominant allele in their genotype. This means that even if there is a recessive allele present, the dominant allele will be the one observed in the phenotype. Dominant alleles mask the expression of recessive alleles when they are both present in an individual's genetic makeup.
What is is the principal of dominance?
The principle of dominance states that in a heterozygous individual for a trait, only one allele (dominant allele) is expressed in the phenotype, masking the expression of the other allele (recessive allele). This dominance relationship is seen in Mendelian inheritance patterns.
What is the probability of obtaining a dominant phenotype from self-fertilization of a heterozygous individual is?
The probability of obtaining a dominant phenotype from self-fertilization of a heterozygous individual is 75%. This is because in a heterozygous individual, there is a 50% chance of passing on the dominant allele and a 50% chance of passing on the recessive allele. With self-fertilization, the possible combinations are: 1 dominant allele (25%), 2 dominant alleles (50%), and 1 recessive allele (25%). Dominant phenotype will be expressed if there are one or more dominant alleles present.
What is a alle?
The dominant allele is the one that determines the phenotype in a heterozygous individual.
How many alleles are there in codominance?
In codominance, there are at least two alleles contributing to the phenotype of an individual, each allele independently expressed. This means that both alleles are fully expressed in the heterozygous genotype, resulting in a distinct phenotype.
What would the alleles of a heterozygous trait look like?
In a heterozygous individual, the alleles for a trait are different. Each allele may be represented by a different letter (e.g., Aa), where one allele is dominant and the other is recessive. The dominant allele is typically expressed in the phenotype, while the recessive allele is not unless the individual is homozygous recessive.
When is a recessive allele for a trait expressed in the phenotype of an dividual?
A recessive allele for a trait is expressed in the phenotype of an individual only when the individual is homozygous for that allele, meaning it has two copies of the recessive allele (one from each parent). If the individual has at least one dominant allele for that trait, the dominant trait will be expressed instead. Therefore, the presence of the recessive phenotype is only visible when both alleles are 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
If Genotype of a G as dominate green and g for recessive yellow what would the heterozygous look like?
The heterozygous genotype would be Gg. This means the individual has one dominant green allele (G) and one recessive yellow allele (g). The dominant trait (green in this case) would be expressed in the phenotype of the individual.
What is an individual with genotype AAA described as?
An Aa genotype can result in the same phenotype as either an AA or AA genotype, if one of the alleles acts in a dominant fashion. If the A allele is dominant over the a allele, then the phenotype of a heterozygous (Aa) individual will be the same as the phenotype of a homozygous dominant (AA) individual.
What are the circumstances under which dominant alleles will be expressed?
Dominant alleles are expressed when an individual has at least one copy of the dominant allele in their genotype. This means that even if there is a recessive allele present, the dominant allele will be the one observed in the phenotype. Dominant alleles mask the expression of recessive alleles when they are both present in an individual's genetic makeup.
What is it called having a dominate and recessive allele?
Having a dominant and recessive allele is known as Mendelian inheritance, named after Gregor Mendel, the scientist who first described it. In this type of inheritance, the dominant allele masks the expression of the recessive allele in heterozygous individuals.
Why do we call some alleles dominant?
because it dominates the phenotype
What is the phenotype of a heterozygous individual what is the genotype of a heterozygous individual?
Bb The phenotype is what the individual looks like. The genotype is the genetic material at the site that can be passed on even if it isn't expressed. For example: Animal with black hair bb (can only pass the black characteristic on to it's offspring because it is homozygous recessive). It is phenotypically black. An animal with red hair can be Bb or BB. Bb is heterozygous and the animal is phenotypically red. BB is homozygous dominant for red and the animal is phenotypically red. More information than requested but an explanation none the less.
