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Yes.
There are some traits like skin color that are controlled by multiple genes within an individual.
There is also a problem called nondisjunction that causes a gamete to wind up with two chromosomes instead of one. The offspring then has three chromosomes and three genes for each trait carried on that chromosome.
(Nondisjunction of the 21st chromosome causes Down syndrome, so someone with Down Syndrome has three genes for each trait on the 21st chromosome.)
What else can I help you with?
What is the difference between single-gene traits and complex traits?
Single gene diseases only effect one typeof gene where im a complex genetic disease many genes are effected. An example of a single gene diseas is sickle cell anemia. Cancer would be an eexample of a complex gene disease.
What is dominant and recessive?
These are terms used in a punnet square. Dominant is the Phenotype, or a gene that is predicted to be expressed in a heterozygous being- the offspring of two beings with different traits. Recessive is the Genotype, or a gene that is predicted to be hidden in the Deoxyribose Nucleic Acid, (DNA,) of a heterozygous being. Sometimes there is Codominance, where both genes are fully expressed, or incomplete dominance, where the genes are mixed, and are partially expressed.
When the alleles of a gene pair are expressed differently but neither is dominant to the other?
Codominance means that neither allele can mask the expression of the other allele. An example in humans would be the ABO blood group, where alleles A and alleles B are both expressed.
What are characteristics passed from parent to offspring called?
genetic traits
When would a mutation in DNA not cause a change in how the gene is expressed or in which proteins are made?
If a point mutation occurs in a location that is not critical to the structure and function of the protein, it will not change the way the gene is expressed. Also, since most amino acids have more than one codon, if the point mutation resulted in a codon for the same amino acid without the mutation, it will not change the way the gene is expressed.
The gene that is fully expressed when two different alleles are present is the?
heterozygous gene. In this situation, both alleles are different and both are expressed, resulting in a blending or mixing of their traits.
Traits on a gene are expressed by?
C. Alleles
How is Dominant and Recessive differ?
Dominant traits are expressed when just one copy of the gene is present, while recessive traits require two copies to be expressed. Dominant traits mask recessive traits when they are both present.
Comapre and contrast dominant and recessive traits?
Dominant traits are characterized by a single copy of a gene being sufficient to express a certain trait, whereas recessive traits require two copies of the gene (one from each parent) for the trait to be observed. Dominant traits typically mask the expression of recessive traits when both are present.
Traits that are typically expressed even if an offspring inherits just one copy of a gene for the trait are called?
Dominant Traits
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.
What genes are recessive traits?
These traits are called dominant traits. They will overcome the recessive gene and the dominant trait will be expressed. A recessive gene needs two alleles present in its genotype to be expressed.
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.
Traits that are typically expressed even if an offspring inherits just one copy of a gene for the trait are called what traits?
Dominant trait due to doominant gene (as against recessive trait)
What gene is always expressed?
Dominant genes will always be expressed however recessive genes would need to be inherited from both parents
Traits that typically will only be expressed in offspring if they inherit two copies of the genes for the trait are called?
Traits that typically will only be expressed in offspring if they inherit two copies of the genes for the trait are called Recessive traits. - Nikkkki
A pattern in which both versions of a gene show?
A pattern where both versions, or alleles, of a gene are fully expressed in the phenotype is called codominance. In this scenario, the traits associated with both alleles are visible in the offspring. An example is the ABO blood group system, where an individual can have both A and B antigens expressed on their red blood cells if they inherit both A and B alleles.
