When there are 2 dominant alleles for the same gene?

If two alleles of a given gene are identical, the organism is called a homozygote and is said to be homozygous with respect to that gene; if instead the two alleles are different, the organism is a heterozygote and is heterozygous.

When there are 2 dominant alleles for the same gene it is called?

Genotypes are described as homozygous if there are two identical alleles at a particular locus and as heterozygous if the two alleles differ. Alleles contribute to the organism’s phenotype, which is the outward appearance of the organism.

What happens if you have two dominant alleles?

When you have two copies of the alleles that are both dominant, this is called codominance . For example, if the dominant trait is red for flowers and another dominant trait is white, then the flower will have both red and white as the dominant traits are expressed equally.

Where are 2 alleles of the same gene?

A given gene may have multiple different alleles, though only two alleles are present at the gene’s locus in any individual.

Are two alleles of the same gene always the same?

An allele is one of two or more versions of a gene. … If the two alleles are the same, the individual is homozygous for that gene. If the alleles are different, the individual is heterozygous.

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What do multiple alleles mean?

: an allele of a genetic locus having more than two allelic forms within a population.

What are the two inheritance patterns of blood type?

Blood Inheritance



Just like eye or hair color, our blood type is inherited from our parents. Each biological parent donates one of two ABO genes to their child. The A and B genes are dominant and the O gene is recessive. For example, if an O gene is paired with an A gene, the blood type will be A.

What is multiple alleles give an example?

Multiple alleles refer to the occurrence of three or more than three alleles for a particular gene. Alleles are different or contrasting forms of a gene. For example, for the gene encoding for height, one allele can be for tallness, whereas the other can be for dwarfness.

How are alleles named?

Allele designations appear as superscripted short alphanumeric strings following the gene symbol of which they are an allele and serve as an acronym for the allele name. … Allele designations begin with a lower case letter if the allele is a recessive and begin with a capital letter otherwise.

Why do we have two alleles for each gene?

Since diploid organisms have two copies of each chromosome, they have two of each gene. Since genes come in more than one version, an organism can have two of the same alleles of a gene, or two different alleles. This is important because alleles can be dominant, recessive, or codominant to each other.

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