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No, recessive traits refer to the inheritance pattern of the allele. In the simple case where a trait is either expressed or not, if it is a recessive trait it will only be the expressed phenotype when it is homozygous. Dominant allele phenotypes will show if the genotype is heterozygous.
What else can I help you with?
What are two forms that a gene or allele may take?
A gene or allele may take a dominant form, or a recessive form. If the allele is recessive, the characteristic which is coded for will be exhibited only if both the gene from the male and the gene from the female is recessive. Only one copy of a dominant allele is required to cause expression of the dominant characteristic
What alleles would a homozygous recessive organism have?
A homozygous recessive organism would have two copies of the same recessive allele for a particular gene. This means that both alleles carried by the organism would be the recessive form.
What is the process in which DNA changes to form new alleles?
Crossing-over
How do you write alleles?
Alleles are represented by letters, and two letters are used for each gene to denote the alleles inherited from each parent. For example, "Aa" represents a heterozygous individual with one dominant allele (A) and one recessive allele (a) for a particular trait. When writing alleles, uppercase letters are typically used to represent dominant alleles and lowercase letters are used for recessive alleles.
The dominant or recessive form that a gene takes is?
determined by its specific genetic instructions. Genes can be dominant (expressed when present) or recessive (expressed only when two copies are present) based on the interaction of alleles at a specific locus on a chromosome. The dominant form masks the recessive form in heterozygous individuals.
Different forms of a gene?
the alternative form of a gene is called an "allele."
Dominant alleles are so called because under most circumstances they?
are phenotypically expressed. They are expressed in homozygous form and in heterozygotes with the recessive allele. Recessive alleles are only phenotypically expressed in homozygous form. Consider two alleles for flower color, A and a, where A is dominant and expressed as red, and a is recessive and expressed as white. There are only three diploid genotypes possible for these alleles: AA Aa and aa.However, because A is dominant, the following phenotypes will be expressed for the following genotypes:AA: redAa: redaa: white
What is the difinition of alleles?
An allele is a form of a gene. For example, the allele B may lead to black fur and the allele b may lead to white fur. Both B and b are alleles for fur colour.In general notation, dominant alleles are written with a capital letter (eg. B, T, P) and recessive alleles are written with a lower case letter (eg. b, t, p). A person will have two alleles (one from each parent) for every gene. Dominant alleles are expressed over recessive alleles.
Why is it not necessary when the dominant and recessive traits are known to use the term homozygous when referring to the genotype of an individual that has a recessive phenotype?
When the dominant and recessive traits are known, using the term "homozygous" for the recessive phenotype is redundant because it implies that both alleles are the same (rr for a recessive phenotype). It is clear that the individual is homozygous for the recessive allele by observing their phenotype.
Is a recessive gene expressed?
Ok, im assuming your question is "if two recessive alleles are present will the trait be expressed" A trait will be expressed if two alleles are recessive but it will not be the same representation as two dominant alleles. For example, T being a tall pea plant and t being a small pea plant. Two recessive alleles or, homozygous recessive, alleles The other option would be there is one dominant and one recessive, heterozygous, which would look like Tt. This would take on the trait of the dominant allele usually expressed by the capital letter. So this heterozygous plant would be tall.
How do alleles interact in intermediate inheritance?
In intermediate inheritance, two different alleles at a single gene locus interact to produce a phenotype that is a blend of the two alleles. This results in a phenotype that falls between the dominant and recessive traits, rather than showing a clear dominant-recessive relationship. Both alleles contribute to the final phenotype in a co-dominant or blending manner.
What is an example of a different form a gene may have for a trait?
The different forms of a genes for a single trait are known as alleles there can be a dominate allele which always shows up when present and a recessive allele which only shows up when both alleles are recessive or there is no dominate allele
