Which allele is expressed in a heterozygous individual?

Some alleles are dominant or recessive. When an organism is heterozygous at a specific locus and carries one dominant and one recessive allele, the organism will express the dominant phenotype.

What allele is expressed in a homozygous individual?

The dominant allele is expressed more strongly, so it masks the recessive allele. However, in a homozygous genotype, this interaction doesn’t occur. You either have two dominant alleles (homozygous dominant) or two recessive alleles (homozygous recessive).

What alleles that are both expressed in a heterozygote?

Closely related to incomplete dominance is codominance, in which both alleles are simultaneously expressed in the heterozygote.

Which is a heterozygous genotype?

An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. In our example, this genotype is written Bb. Finally, the genotype of an organism with two recessive alleles is called homozygous recessive. In the eye color example, this genotype is written bb.

When both alleles are expressed equally in the phenotype of the heterozygotes?

Codominance occurs when both alleles are expressed equally in the phenotype of the heterozygote. The red and white flower in the figure has codominant alleles for red petals and white petals. Codominance.

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What are the 3 types of genotypes?

There are three types of genotypes: homozygous dominant, homozygous recessive, and hetrozygous.

What type of allele will be expressed if both dominant and recessive alleles are present?

If both alleles are dominant, it is called codominance?. The resulting characteristic is due to both alleles being expressed equally. An example of this is the blood group AB which is the result of codominance of the A and B dominant alleles.

What is a genotype of an individual?

A genotype is an individual’s collection of genes. The term also can refer to the two alleles inherited for a particular gene. … The expression of the genotype contributes to the individual’s observable traits, called the phenotype.

Is HH homozygous or heterozygous?

Half the possible offspring will be homozygous, HH, and half will be heterozygous, Hh.

Is EE heterozygous or homozygous?

The individual is homozygous for the trait when it has two identical alleles. In the example above about earlobes, both the EE and ee individuals are homozygous for the trait. The person with the Ee genotype is heterozygous for the trait, in this case, free earlobes.

What is the homozygous for the B allele?

Thus, if one parent is homozygous for type A blood and the other is homozygous for type B, the offspring will have a new phenotype, type AB. In people with type AB blood, both A and B proteins are expressed on the surface of red blood cells equally.

Which is heterozygous TT or TT?

If an organism has two different alleles (Tt) for a certain gene, it is known as heterozygous (hetero means different).

Genotype and Phenotype.

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Genotype Definition Example
Heterozygous One dominant allele and one recessive allele Tt
Homozygous dominant Two dominant alleles TT

What is heterozygous and homozygous examples?

Heterozygous means that an organism has two different alleles of a gene. For example, pea plants can have red flowers and either be homozygous dominant (red-red), or heterozygous (red-white). If they have white flowers, then they are homozygous recessive (white-white). Carriers are always heterozygous.