A homozygous gene has how many copies of the same gene?

Correct option is B

A homozygous gene refers to a condition where an individual has two identical alleles for a specific gene at a particular locus on homologous chromosomes. These two copies can be either both dominant (AA) or both recessive (aa).

Information Booster:
-Genotypic Expression: Homozygous conditions express a clear trait, while heterozygous conditions may result in dominant trait expression.
-Examples in Genetics:
-    Homozygous Dominant (AA): Brown eyes (if "A" represents the dominant brown eye color).
-    Homozygous Recessive (aa): Blue eyes (if "a" represents the recessive blue eye color).
-Importance in Genetic Disorders: Certain genetic diseases, such as cystic fibrosis and sickle cell anemia, occur in homozygous recessive (aa) conditions.
-Mendel’s Law of Segregation: Gregor Mendel’s genetic studies explain how alleles segregate during gamete formation, leading to homozygous or heterozygous offspring.