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A population of an organism sHow is more than two alleles for a characteristic this is a case of?
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∙ 6y ago
multiple alleles
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∙ 6y ago
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Using the terms dominant recessive explain the difference between genotype and phenotype?
No, I think you have your terms confused.The terms "dominant" and "recessive" are applied to alleles of a genotype. A genotype is an expression (using upper- and lower-case letters) that shows what alleles an organism has for a particular locus. The two alleles (in most cases) inherited (one from mother and one from father) can either be dominant or recessive. The recessive allele is not fully expressed in the presence of the dominant allele and is only expressed when there are two recessive alleles. The genotype could be called "recessive" I suppose if the genotype is homozygous recessive. But remember that two recessive alleles as a genotype is only one possibility - in which case you can't say the "genotype is recessive".The phenotype is dependent on the genotype. If present, the dominant alleles (in simple Mendelian genetics) will determine the phenotype - what the organism's trait or characteristic is. The phenotype will never be what is coded by the recessive allele unless the genotype is two recessive alleles.
What are organisms that have two different alleles?
When you have two identical alleles you are said to be homozygous for that particular trait. If the trait is dominant, then you are homozygous dominant. If the trait is recessive, then you are homozygous recessive.
How dominant and recessive alleles are represented in a Punnett Square?
Dominant alleles are written in upper case (i.e, 'A'), while recessive alleles are lower case (i.e, 'a')
What is the phenotype of an orgarism?
The phenotype is the characteristic or trait that is expressed in the organism. So, for example, if a person has blue eyes, his/her phenotype for eye color is blue. In case you didn't know, the genotype is simply the gene that codes for the phenotype. So with the blue eyes, the genotype of the person for eye color must have been recessive alleles (because blue eyes are a recessive trait).
How do multiple alleles control the trait?
In the case of multiple alleles, one trait is governed by more than two alleles. One example is the human ABO blood group. There are three alleles, A, B, and O. A person can, however, only inherit two of the three alleles.
Using the terms dominant recessive explain the difference between genotype and phenotype?
No, I think you have your terms confused.The terms "dominant" and "recessive" are applied to alleles of a genotype. A genotype is an expression (using upper- and lower-case letters) that shows what alleles an organism has for a particular locus. The two alleles (in most cases) inherited (one from mother and one from father) can either be dominant or recessive. The recessive allele is not fully expressed in the presence of the dominant allele and is only expressed when there are two recessive alleles. The genotype could be called "recessive" I suppose if the genotype is homozygous recessive. But remember that two recessive alleles as a genotype is only one possibility - in which case you can't say the "genotype is recessive".The phenotype is dependent on the genotype. If present, the dominant alleles (in simple Mendelian genetics) will determine the phenotype - what the organism's trait or characteristic is. The phenotype will never be what is coded by the recessive allele unless the genotype is two recessive alleles.
Is statistic a measure that describes a population characteristic?
Not necessarily.For instance, one can calculate a so-called 't' statistic as a way of testing an hypothesis about one or two population means. Notice that in this case the statistic does not describe a population characteristic.
What are organisms that have two different alleles?
When you have two identical alleles you are said to be homozygous for that particular trait. If the trait is dominant, then you are homozygous dominant. If the trait is recessive, then you are homozygous recessive.
How dominant and recessive alleles are represented in a Punnett Square?
Dominant alleles are written in upper case (i.e, 'A'), while recessive alleles are lower case (i.e, 'a')
How are dominant and recessive represented in a punnett square?
Dominant alleles are written in upper case (i.e, 'A'), while recessive alleles are lower case (i.e, 'a')
What is the phenotype of an orgarism?
The phenotype is the characteristic or trait that is expressed in the organism. So, for example, if a person has blue eyes, his/her phenotype for eye color is blue. In case you didn't know, the genotype is simply the gene that codes for the phenotype. So with the blue eyes, the genotype of the person for eye color must have been recessive alleles (because blue eyes are a recessive trait).
How do you record dominant and recessive alleles?
You record dominant alleles with capital letters and recessives with lower case letters.
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.
What gene pair consists of a dominant or recessive alleles?
Autosomal genes that can be expressed by Mendelian genetics. The question isn't very specific but the easiest way to determine a gene pair which consists of dominant or recessive alleles is to understand the terms. In most genotypic descriptions, the phenotype of a specific organism is represented by letters. A dominant allele controls the phenotype of the organism and is usually a capital letter. The recessive allele is usually represented by a lower case letter which may or may not be the same as the upper case. Further research will lead you to Mendelian genetics where theories such as duplicate recessive epistasis results in the lower case letter in the phenotype controlling the phenotype of the organism. Hope this helps. :-)
What contrasting alleles may in some cases result in a case where neither allele is dominant over the other?
If both alleles are recessive, then you will haev a case where contrasting alleles that do not have dominance. Neither allele has the power to be dominant so they will both have equal power of genetics.
A recessive allele is represented by an letter?
Most of the time a recessive allele is expressed using lower case letters in comparision to the upper case dominant alleles.
What are the different forms of a gene called?
Alleles are the different forms of a gene.Alleles are corresponding pairs of genes located at specific positions in the chromosomes. Together, alleles determine the genotype. Alleles which determine some aspect of the phenotype, the physical appearance of an organism, are said to be coding alleles.When both alleles in a pair are the same, the alleles are homozygous. If the alleles are different, they are heterozygous. In the case of homozygous alleles, the expression of phenotype is usually very straightforward. In heterozygous instances, however, the phenotype of the organism is determined by which allele is dominant, meaning that one allele overrides the other.In the case of eye color in humans, if someone inherits a blue allele and a brown allele, his or her eyes will be brown, because brown is a dominant genetic trait, requiring only one allele for expression. However, if that person had a child with someone who also carried a blue allele and both parents passed the blue trait down, the child would have blue eyes. This explains why blue-eyed children sometimes randomly pop up in a brown-eyed family: because someone in the family's genetic history had blue eyes.
