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You cross a pure-breeding plant with red flowers and a pure -breeding plant with white flowers. All the offspring have red white speckled flowers. what type of allele relationship does this show?
You cross a pure-breeding plant with red flowers and a pure-breeding plant with white flowers. All the offspring have red and white speckled flowers. What type of allele relationship does this show?
How do dominant and recessive alleles affect pheno type?
An allele can effect the phenotype of an organism by its dominance or recessiveness. If two dominant alleles are crossed the offsprings will carry the dominant trait of the alleles. If a dominant allele is crossed with recessive allele the phenotype of the offsprings will be of that of the dominant allele. And if two recessive alleles are crossed the phenotype of their offsprings will carry the reccesive trait.
Two dominant alleles are expressed at the same time?
The alleles are not always both expressed.Take the simplest example, a case when there are only two alleles for a trait, R and r. When the organism is a heterozygote, meaning that it has both alleles with a genotype of Rr, only the phenotype carried by the dominant allele, the R, will be expressed. The dominant allele masks the phenotype of the recessive allele. A case in which only the dominant phenotype is expressed in a heterozygote is a case of complete dominance.*Cases where the dominant allele does not completely mask the recessive allele are cases of incomplete dominance and co-dominance.In incomplete dominance, the dominant allele has some effect on the recessive allele, but not a full effect. This results in a third phenotype in the population. Think red and white flowers leading to pink flowers.In co-dominance, the dominant allele has as much effect on the phenotype of the organism as the recessive allele. Think red and white flowers now leading to red and white streaked flowers.
How is incomplete dominance expressed in phenotype?
In complete dominance, only one allele in the genotype is seen in the phenotype. In codominance, both alleles in the genotype are seen in the phenotype. In incomplete dominance, a mixture of the alleles in the genotype is seen in the phenotype.
How do you know if an allele is co-dominant?
An allele is a small piece of DNA responsible for some characteristic that plugs into a gene locus (or position) along a chromosome. Suppose the particular gene locus is responsible for flower colour in some plant. There may be alleles that plug in amongst the plant population for red or yellow flowers. Since chromosomes are paired, several combinations are possible. Both alleles may be red so the flower will be red and similarly for yellow. If there is a red allele and a yellow allele you may either get orange flowers but if one allele is dominant over the other the flower colour will be either red or yellow depending on which allele is dominant. If the red allele is dominant over the yellow there will be more red flowers. If it was only as simple as this three quarters of the flowers would be red and onequarter would be yellow. For two possible alleles with red dominant over yellow, there are four combinations:- R R Red flowers R Y Red flowers Y R Red flowers Y Y Yellow flowers
What type of allele dominance occurs when both alleles are active and expressed?
Either Co-dominance, where different parts of the organism display the different alleles (i.e. red and white flowers), or a combination of the two alleles (i.e. red and white alleles make pink flowers)
You cross a pure-breeding plant with red flowers and a pure -breeding plant with white flowers. All the offspring have red white speckled flowers. what type of allele relationship does this show?
You cross a pure-breeding plant with red flowers and a pure-breeding plant with white flowers. All the offspring have red and white speckled flowers. What type of allele relationship does this show?
What is the name of inheritance pattern in which both alleles are expressed equally?
It depends on what you mean by "both are expressed". In order for both alleles to be expressed, both alleles must be dominant alleles. If one allele is recessive, it will be masked. If you are talking about alleles that are co-dominant, then both alleles would be expressed together. Ex: Red x white = red and white flower If you are talking about incomplete dominance, then both alleles are seen as a blend of both in the offspring. Ex: red x white = pink flower If you are talking about multiple alleles (like in human blood typing), then you can see 2 alleles expressed together. Ex: Type A x Type B can produce AB blood type.
What are two alleles for feathers color?
Purple flowers are dominant to white flowers.
How do dominant and recessive alleles affect pheno type?
An allele can effect the phenotype of an organism by its dominance or recessiveness. If two dominant alleles are crossed the offsprings will carry the dominant trait of the alleles. If a dominant allele is crossed with recessive allele the phenotype of the offsprings will be of that of the dominant allele. And if two recessive alleles are crossed the phenotype of their offsprings will carry the reccesive trait.
Purple flowers are dominant to white flowers?
If purple flowers are dominant to white flowers, it means that a plant with one purple allele and one white allele will display the purple flower phenotype. The white flower phenotype would only be expressed if the plant inherits two white alleles.
What is in the pea plants individuals that are Pp for the alleles that code for flower color will have purple flowers.?
A+ purple flowers.
Two dominant alleles are expressed at the same time?
The alleles are not always both expressed.Take the simplest example, a case when there are only two alleles for a trait, R and r. When the organism is a heterozygote, meaning that it has both alleles with a genotype of Rr, only the phenotype carried by the dominant allele, the R, will be expressed. The dominant allele masks the phenotype of the recessive allele. A case in which only the dominant phenotype is expressed in a heterozygote is a case of complete dominance.*Cases where the dominant allele does not completely mask the recessive allele are cases of incomplete dominance and co-dominance.In incomplete dominance, the dominant allele has some effect on the recessive allele, but not a full effect. This results in a third phenotype in the population. Think red and white flowers leading to pink flowers.In co-dominance, the dominant allele has as much effect on the phenotype of the organism as the recessive allele. Think red and white flowers now leading to red and white streaked flowers.
In pea plants individuals that are pp for the alleles that code for flower color will have purple flowers what is the phenotypes?
In pea plants, individuals that are Pp for the alleles that code for flower color will have purple flowers. What is the phenotype?
How is incomplete dominance expressed in phenotype?
In complete dominance, only one allele in the genotype is seen in the phenotype. In codominance, both alleles in the genotype are seen in the phenotype. In incomplete dominance, a mixture of the alleles in the genotype is seen in the phenotype.
In pea plants individuals that are Pp for the alleles that code for flower code for flower color will have purple flowers?
A+ purple flowers.
How do you know if an allele is co-dominant?
An allele is a small piece of DNA responsible for some characteristic that plugs into a gene locus (or position) along a chromosome. Suppose the particular gene locus is responsible for flower colour in some plant. There may be alleles that plug in amongst the plant population for red or yellow flowers. Since chromosomes are paired, several combinations are possible. Both alleles may be red so the flower will be red and similarly for yellow. If there is a red allele and a yellow allele you may either get orange flowers but if one allele is dominant over the other the flower colour will be either red or yellow depending on which allele is dominant. If the red allele is dominant over the yellow there will be more red flowers. If it was only as simple as this three quarters of the flowers would be red and onequarter would be yellow. For two possible alleles with red dominant over yellow, there are four combinations:- R R Red flowers R Y Red flowers Y R Red flowers Y Y Yellow flowers
