RR and RR refer to a homozygous genotype where an individual has two identical dominant alleles for a particular gene.
Based on the provided context, an individual with the genotype RR is homozygous. This means they possess two identical alleles (R and R) for a specific trait.
For example, if 'R' represents the allele for brown hair, an individual with the RR genotype would have brown hair and would only pass on the 'R' allele to their offspring. The reference material states "Individuals carrying two identical alleles (RR or rr) are known as homozygous."
Here's a summary in table form:
| Genotype | Description | Example |
|---|---|---|
| RR | Homozygous dominant (two identical alleles) | Brown hair (if R=brown) |
