explain the relationship between dominant and recessive genes and phenotype using examples
Phenotype is the outward appearance of an organism. The genotype is the actual alleles that are present on the chromosomes of the organism. A homozygous tall plant would have two identical alleles for height (TT) and would appear tall.
A heterozygous tall plant would have the phenotype of a tall plant but would have non-identical alleles (Tt). In this case, tall is dominant and short is recessive and is not expressed. The following diagram shows the results of crossing two heterozygous plants.