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.
A gene is a stretch of DNA or RNA that determines a certain trait. Genes mutate and can take two or more alternative forms; an allele is one of these forms of a gene.For example, the gene for eye color has several variations (alleles) such as an allele for blue eye color or an allele for brown eyes.An allele is found at a fixed spot on a chromosome. Chromosomes occur in pairs so organisms have two alleles for each gene â one allele in each chromosome in the pair.or example, the gene for eye color has several variations (alleles) such as an allele for blue eye color or an allele for brown eyes. An allele is found at a fixed spot on a chromosome.