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In some flowers there are two alleles for color and these can both be expressed equally at the same time Which best describes this trait?
Wiki User
∙ 6y ago
Recessive
Wiki User
∙ 15y ago
Anonymous
Codominant
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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.
If the plants has 9 purple flowers and 3 white flowers what are the factors in the parents?
The factors are purple (P) and (W) for white flowers. Since neither of the alleles were dominant it became co-dominance and the flowers had both colors
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.
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
Is incomplete dominance caused by each allele equally influences the offspring?
not really. that would be co-dominance. incomplete dominance is when a heterozygote genotype is expressed as intermediate between the two alleles. for example: if you cross a red snapdragon (RR) with a white snapdragon (WW) all the offspring will be RW which will code for a different color, such as pink.
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)
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.
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.
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?
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 code for flower color will have purple flowers?
A+ purple flowers.
What is the difference between incomplete dominance and complete dominance?
Complete Dominance: Where in the dominant gene completely masks the effect of the resesive gen in heterozygous conditions. Ex. Tt or Rr. Incomplete Dominance: When 2 or more alleles influence a phenotype. Ex. Flowers. Codominance: When both alleles for a gene are expressed in heterozygous offspring. Ex. Bloodtype.
What is the difference between complete dominance and incomplete dominance?
Complete Dominance: Where in the dominant gene completely masks the effect of the resesive gen in heterozygous conditions. Ex. Tt or Rr. Incomplete Dominance: When 2 or more alleles influence a phenotype. Ex. Flowers. Codominance: When both alleles for a gene are expressed in heterozygous offspring. Ex. Bloodtype.
What allele relationship does it display if you cross a plant with red flowers with a plant with white flowers both plants are pure-breeding and all the offspring have pink flowers?
multipule alleles(novanet)
Which of the following patterns of heredity can result in an intermediate trait such as a pink snapdragon flowers?
multiple alleles
If the plants has 9 purple flowers and 3 white flowers what are the factors in the parents?
The factors are purple (P) and (W) for white flowers. Since neither of the alleles were dominant it became co-dominance and the flowers had both colors
