Question

What is a homozygous genotype?

Answer 1

An organism's genotype is its entire set of genetic material. However, the phrase is frequently used to refer to a single gene or a group of genes, such as the eye colour genotype. An organism's observable traits, such as hair colour, height, and so on, are partly determined by its genes.

Complete answer:
In one meaning, the term "genotype," like the term "genome," refers to an organism's whole set of genes. In a more limited meaning, it might refer to distinct alleles, or variant forms of a gene, that are responsible for specific features or attributes. The genotype of an organism differs from its phenotype, which is the individual's observable features as a result of genotype-environment interactions.
When discussing genotype, biologists refer to dominant alleles as uppercase letters and recessive alleles as lowercase letters. For example, “B” represents a brown allele and “b” stands for a blue allele when it comes to eye colour. A homozygous dominant genotype is defined as an organism with two dominant alleles for a characteristic. This genotype is written BB in the case of eye colour. A heterozygous genotype is defined as an organism with one dominant allele and one recessive allele. This genotype is written Bb in our example. Finally, homozygous recessive refers to the genotype of an organism with two recessive alleles. This genotype is written bb in the eye colour example.

Note:
Only some genes and traits are explained by the homozygous dominant, homozygous recessive, and heterozygous genotypes. Because many genes have more than two alleles, and multiple alleles interact in complex ways, most traits are actually more complex.The genotypes that parents pass down to their offspring determine several physical characteristics such as hair colour and texture, eye colour, and skin colour.