It is the physical expression or appearance of a trait.

It is the genetic makeup or allele combination of an organism.

It is the different forms of a gene.

It is an allele that masks the expression of another allele. It represented by capital letter

carries two dominant alleles for flower color

It is an allele whose expression is masked by a dominant allele. Represented small  letter 

has two copies of the same recessive allele for a particular gene.

carries one dominant allele and one recessive allele

It refers to the patterns of inheritance involving one pair of contrasting characters or alleles.

Probability of   Inheritance

named after its inventor, British geneticist Reginald Punnett.

essential tools for calculating  the probabilities of genetic outcomes.

the inheritance of the allele of a single gene

a genetic cross involving two pairs of alleles at two different loci.