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If a study of several pedigrees demonstrated that two parents are normal but their daughters and sons express a trait then the trait is controlled by what?
If the trait is exhibited in the offspring of two normal parents, it suggests that the trait is a dominant one. This means that only one copy of the gene is needed for the trait to be expressed. Alternatively, the trait could be influenced by a de novo mutation that occurred in the germ cells of one of the parents.
Is frizzle trait in chickens an example of pleiotropy?
No, the frizzle trait in chickens is not an example of pleiotropy. Pleiotropy refers to a single gene affecting multiple traits. However, the frizzle trait is controlled by a single gene that affects only one observable trait - the curliness of feathers.
A widows peak is a humans trait that is controlled by?
A widow's peak is a V-shaped point of hair at the front of the head, and it is controlled by genetics. It is inherited as a dominant trait, meaning one copy of the gene from either parent can result in a widow's peak.
Would a trait that has only two distinct phenotype more likely be a single-gene trait or a polygenic trait How do you know (3 points)?
A trait with only two distinct phenotypes is more likely to be a single-gene trait. This is because single-gene traits are typically controlled by one gene, resulting in discrete phenotypes, such as dominant and recessive. In contrast, polygenic traits involve multiple genes and usually exhibit continuous variation, leading to a wide range of phenotypes rather than just two distinct categories.
A genetic trait expressed in a person who has only one copy of the gene associated with the trait?
This is known as a dominant trait. Dominant traits require only one copy of the gene to be expressed in an individual. The presence of one dominant allele is sufficient to display the trait, even if the individual also carries a different allele for the same gene.
Will a A trait controlled by a dominant gene be expressed even if the instructions of the corresponding gene in the other half of the pair are different?
Yes, if a trait is controlled by a dominant gene, it will be expressed regardless of the instructions of the corresponding gene in the other half of the pair. Dominant genes only require one copy to be expressed in the phenotype.
Which will give a trait the fewest phenotype?
if its all controlled by one gene
What is a trait controlled by one gene?
How nice you are. Yeah I was shocked too when I found out.
What is a trait is called when it is controlled by more than one gene?
Polygenic Traits
WHAT is single gene trait?
A single gene trait is a specific characteristic or phenotype that is influenced by the expression of a single gene. This means that the presence or absence of a particular trait is determined by variations in one specific gene. Examples include earlobe attachment, hair color, and tongue rolling.
Which is a mendelian trait?
A trait controlled by many genes
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.
How is the gene involved in sickle cell anemia different from the genes for pea plants' traits that Mendel studied?
One gene controlled one trait within Mendel's study, but the sickle cell anemia effects more than one trait.
Is a non mendelian trait controlled by one gene?
A non Mendelian trait can be controlled by one gene. When a trait is controlled by one gene it results in genetic disorders. Examples of disorders due to single gene inheritance - Huntington disease, Fragile-X syndrome.
If a study of several pedigrees demonstrated that two parents are normal but their daughters and sons express a trait then the trait is controlled by what?
If the trait is exhibited in the offspring of two normal parents, it suggests that the trait is a dominant one. This means that only one copy of the gene is needed for the trait to be expressed. Alternatively, the trait could be influenced by a de novo mutation that occurred in the germ cells of one of the parents.
Is frizzle trait in chickens an example of pleiotropy?
No, the frizzle trait in chickens is not an example of pleiotropy. Pleiotropy refers to a single gene affecting multiple traits. However, the frizzle trait is controlled by a single gene that affects only one observable trait - the curliness of feathers.
Will an offsping show a recessive trait if only one of its parents has the gene for that trait?
No
