What is an example of homozygous?
An organism can be homozygous dominant, if it carries two copies of the same dominant allele, or homozygous recessive, if it carries two copies of the same recessive allele. … For example, pea plants can have red flowers and either be homozygous dominant (red-red), or heterozygous (red-white).
Is TT an example of homozygous?
If an organism has two different alleles (Tt) for a certain gene, it is known as heterozygous (hetero means different).
Genotype and Phenotype.
|Homozygous||Two of the same allele||TT or tt|
|Heterozygous||One dominant allele and one recessive allele||Tt|
What is heterozygous example?
If the two versions are different, you have a heterozygous genotype for that gene. For example, being heterozygous for hair color could mean you have one allele for red hair and one allele for brown hair. The relationship between the two alleles affects which traits are expressed.
Which allele is always written first?
The alleles are represented by letters. The letter chosen is usually the first letter of the trait.
Is BB homozygous or heterozygous?
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. In our example, this genotype is written Bb.
What is heterozygous recessive example?
One such example is brown eyes (which is dominant) and blue eyes (which is recessive). If the alleles are heterozygous, the dominant allele would express itself over the recessive allele, resulting in brown eyes.