What is geno-type?

Answer 1

A gene in the body or plant or animal etc, that can not be seen.

Answer 2

It is the genetic makeup of something, as opposed to the physical expression of the genes (phenotype). They are expressed in a pair of letters, usually, which are alleles.

The allele pairs genotype is commonly expressed as RR(each letter representing one allele) as a Dominant trait, Rr as co-dominant or rr as recessive. This example uses the letter R, but different letters are used to describe different traits, they are in actual fact just variables.