Hybrid tea flowers are well-formed with large, high-centred buds, supported by long, straight and upright stems. Each flower can grow to 8-12.5 cm wide. Hybrid teas are the world's most popular type of rose by choice due to their color and flower form.Their flowers are usually borne singly at the end of long stems which makes them popular as cut flowers.ach flower can grow to 8-12.5 cm wide. Hybrid teas are the world's most popular type of rose by choice due to their color and flower form. Their flowers are usually borne singly at the end of long stems which makes them popular as cut flowers.
Gene Pool, Alleles and Variation in the Population. Genes have many different forms (alleles). This forms the basis of the study of population genetics. Populations are made up of members of the same species which interbreed.ecombination (Crossing Over). This is the exchange of genetic material between adjacent chromatids on the homologous chromosomes. This random exchange of DNA results in many new combinations of alleles on chromosomes, creating great potential for variation.
Genes and Alleles. Genes are pieces of DNA that code for traits expressed by the individual. There is more than one variant for many genes, slight differences in the copies of the gene that change the trait that the individual expresses. The variants of the gene are known as alleles and individuals who are diploid for that trait have two alleles, getting one copy of their genome from each parent.