Individuals carrying two identical alleles (RR or rr) are known as homozygous. While individual organisms bearing different alleles (Rr) are known as heterozygous. For example, assume gene of hair colour has two alleles, one of the allele codes for brown (R) and the other codes for black (r).
What is an example of homozygous and heterozygous?
Homozygous means that the organism has two copies of the same allele for a gene. … 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).
Is AA a homozygous or heterozygous?
Two dominant alleles (AA) or two recessive alleles (aa) are homozygous. One dominant allele and one recessive allele (Aa) is heterozygous.
Which is an example of homozygous genotype?
A homozygous genotype is one in which both alleles are the same, and an organism with a homozygous genotype is said to be true-breeding or purebred. … For example, in pea plants, height is governed by a single gene with two alleles, in which the tall allele (T) is dominant and the short allele (t) is recessive.
What are heterozygous examples?
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.
Is nn homozygous?
TT, Tt, YY, Hh, Ll, Pp, PP, MM, Nn, Rr, Qq, QQ, qq, mm, tt. Homozygous genotypes have either all dominant alleles (all capital letters) or all recessive alleles (all lowercase letters). … They are represented by one capital and one lowercase letter. Tt, Hh, Ll, Pp, Nn, Rr, Qq.
Is KK homozygous dominant?
“KK” is a homozygote for the dark green gene. Most autosomal dominant mutations are incomplete (as is this one) meaning that the heterzygote has a different phenotype (or appearance) than both the homozygous dominant form (KK) and the homozygous recessive for (kk).
Is TT homozygous dominant?
When an organism has two of the same alleles for a specific gene, it is homozygous (homo means “same”) for that gene.
Genotype and Phenotype.
|Heterozygous||One dominant allele and one recessive allele||Tt|
|Homozygous dominant||Two dominant alleles||TT|
|Homozygous recessive||Two recessive alleles||tt|
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.