Which is the result of a dominant allele?
A dominant allele is a variation of a gene that will produce a certain phenotype, even in the presence of other alleles. A dominant allele typically encodes for a functioning protein. The allele is dominant because one copy of the allele produces enough enzyme to supply a cell with plenty of a given product.
What does a dominant allele look like?
Dominant alleles are seen as an uppercase of a letter; for example, B. Recessive alleles are seen as a lower case of a letter; b. In order for a person to show the dominant trait, one of the person’s parents must have the dominant trait (which is an uppercase letter).
Is BB dominant or recessive?
An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB. An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype.
What is a dominant allele quizlet?
A dominant allele is an allele whose trait always shows up in the organism when the allele is present. … A recessive allele is an allele that is masked when a dominant allele is present.
What are the 3 types of dominance?
There are different types of dominance: incomplete dominance, co-dominance and complete dominance.
What is a dominant allele and recessive allele?
Dominant refers to the relationship between two versions of a gene. Individuals receive two versions of each gene, known as alleles, from each parent. If the alleles of a gene are different, one allele will be expressed; it is the dominant gene. The effect of the other allele, called recessive, is masked.
What is an example of a dominant?
The definition of dominant is a person who is in a position of power or who is exhibiting powerful or controlling tendencies. An example of dominant is a strong and powerful CEO. … An example of a dominant gene is the brown-eyed gene, compared to the blue-eyed gene which is recessive.
Which genes are dominant?
Examples of Dominant Traits
- Dark hair is dominant over blonde or red hair.
- Curly hair is dominant over straight hair.
- Baldness is a dominant trait.
- Having a widow’s peak (a V-shaped hairline) is dominant over having a straight hairline.
- Freckles, cleft chin and dimples are all examples of a dominant trait.
What heterozygous dominant?
The term “heterozygous” also refers to a pair of alleles. Unlike homozygous, being heterozygous means you have two different alleles. You inherited a different version from each parent. In a heterozygous genotype, the dominant allele overrules the recessive one. Therefore, the dominant trait will be expressed.
Is BB heterozygous or homozygous?
An individual that contains two copies of the same allele for a specific gene is homozygous. An individual that contains two different alleles of a gene is heterozygous. A cow that has two alleles for a red coat is homozygous (bb). A bull with two alleles for a black coat is homozygous (BB).
What is a dominant allele biology?
Definitions of dominant allele. an allele that produces the same phenotype whether its paired allele is identical or different.
What makes a dominant allele different from a recessive allele quizlet?
What is the difference between a dominant and recessive allele? A dominant allele is always expressed or evident. it is in a homozygous (BB) or heterozygous (Bb) pair. A recessive allele is only expressed when in a homozygous pair(bb).
What is a dominant quizlet?
Dominant. Describes a trait that covers over, or dominates, another form of that trait. Recessive. trait of an organism that can be masked by the dominant form of a trait.