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What is the relationship between dominant and recessive traits?
Think of it this way--
A dominant gene will suppress the expression of a recessive gene.
A dominant trait is the expressed result of an organism having either one dominant and one recessive gene for that trait, OR two dominant genes for that trait. For example, brown eye color is normally dominant over blue.
A recessive trait is the expressed result of having two recessive genes. For example, you need two recessive genes to get blue eyes.
Each parent contributes one gene for each trait. If a parent carries a recessive gene for blue and a dominant gene for brown, that parent will have brown eyes, but can contribute either gene to a child. If the other parent has the same, the child could have two brown eyed parents but have blue eyes.
Eye color is a visible trait, but each gene location can be or contribute to a trait not visible to the eye. For example, the genetic disposition to ovarian cancer is not something we can see without genetic testing.
A recessive gene can be inherited and remain silent for generations, waiting to pair up with another recessive to be expressed. The knowledge that this does occur is one of the reasons why genetic testing is recommended before having children. There are so-called lethal genes that are recessive and only become problematic when they meet up with another.
I know I have simplified things here, but I hope that gets to the core of your question. I recommended taking a look at the OMIM.org website to appreciate how complex this really is. That the unraveling of the miracle of the human genome has been accomplished during the last decade is truly wonderful.
What else can I help you with?
What type of traits is inherited if an organism receives recessive alleles?
The trait received is recessive.
Characteristic that is inherited that can be either dominant or recessive?
Eye color is an example of a characteristic that can be inherited as either dominant or recessive. Factors such as skin tone, hair color, and height can also be inherited in a similar manner.
In order to have a recessive trait an organism must have what copies of he recessive allele?
In order to express a recessive trait, an organism must have two copies of the recessive allele, one inherited from each parent. This is because the presence of a dominant allele will mask the effect of the recessive allele, preventing the recessive trait from being expressed. Thus, only when both alleles are recessive will the trait be visible in the organism's phenotype.
What is a trait that appears only if an organism has two factors for the traits?
A trait that appears only if an organism has two factors for that trait is known as a recessive trait. Recessive traits are expressed phenotypically only when an individual has two copies of the recessive allele, one inherited from each parent. If an organism has one dominant allele and one recessive allele, the dominant trait will be expressed instead. This concept is a fundamental aspect of Mendelian genetics.
What is it called when both copies of genes are recessive?
When both copies of a gene are recessive, the organism is said to be homozygous recessive for that gene. This means that the individual has inherited the recessive allele from both parents, resulting in the expression of the recessive trait associated with that gene.
Is hemophilia A inherited as a recessive or dominant trait?
Hemophilia A is inherited as a recessive trait.
What type of trait is inherited of an organism receives two recessive alleles?
The trait received is recessive.
What type trait is inherited if an organism receives two recessive alleles?
The trait received is recessive.
When two recessive alleles are inherited the trait is observed?
When two recessive alleles are inherited, the trait associated with those alleles is observed because there is no dominant allele to mask its expression. This results in the individual displaying the recessive trait.
What type of traits is inherited if an organism receives recessive alleles?
The trait received is recessive.
When does a recessive trait dominant over a dominant trait?
A recessive trait cannot be dominant over a dominant trait. Dominant traits are always expressed over recessive traits in heterozygous individuals because they mask the expression of the recessive trait.
Characteristic that is inherited that can be either dominant or recessive?
Eye color is an example of a characteristic that can be inherited as either dominant or recessive. Factors such as skin tone, hair color, and height can also be inherited in a similar manner.
How does a person inherit hemophilia and is it dominant or recessive?
It is a sex-linked recessive trait inherited from the mother.
What is an individual who has inherited a factor for a trait?
An individual who has inherited a factor for a trait is a carrier of that trait. They may or may not exhibit the trait themselves, as it depends on whether the inherited factor is dominant or recessive.
Describes a trait or an allele that is expressed only when two of the alleles for the saame characteristic are inherited?
A trait or allele that is only expressed when two alleles of the same type are inherited is called recessive. This means that the individual must inherit two copies of the recessive allele to exhibit the trait. If an individual inherits one dominant allele and one recessive allele for a trait, the dominant allele will be expressed.
When a trait has more than two alleles is that trait inherited?
If one parent has a dominant trait and and another parent has a recessive trait, then the recessive trait gets hidden while the dominant trait gets shown.
What is a trait that is expressed even if only one gene for that form of the trait is inherited?
It is a dominant trait. You only need one gene of a dominant trait for that trait to be expressed. You need two copies of the recessive trait in order for the trait to be expressed.
