A specific form or variation of a gene is called an allele. In roses, one allele is called “everblooming” (e) because this allele causes plants to bloom at a younger age and for longer periods than plants found in the wild. Many modern rose breeds have two copies of the “everblooming” allele, while wild roses have two copies of the dominant “wild” allele (E). Draw a Punnett square that shows how two-parent rose plants, each one having one dominant allele and one recessive allele for blooming, can produce an offspring plant with the characteristics of the “everblooming” allele.

Explain what each position in the Punnett square represents and what the genotype and phenotype of that rose would be.

Compare the offspring from your Punnett square in part (A) to the offspring that result from taking a cutting from one parent rose plant, placing it in the soil, and allowing it to grow roots and produce flowers. Be sure to say what alleles the offspring will have and whether they are “everblooming” or “wild.”

Explanation:

specific form or variation of a gene is called an allele. In roses, one allele is called “everblooming” (e) because this allele causes plants to bloom at a younger age and for longer periods than plants found in the wild. Many modern rose breeds have two copies of the “everblooming” allele, while wild roses have two copies of the dominant “wild” allele (E).

Draw a Punnett square that shows how two-parent rose plants, each one having one dominant allele and one recessive allele for blooming, can produce an offspring plant with the characteristics of the “everblooming” allele.

Explain what each position in the Punnett square represents and what the genotype and phenotype of that rose would be.

Compare the offspring from your Punnett square in part (A) to the offspring that result from taking a cutting from one parent rose plant, placing it in the soil, and allowing it to grow roots and produce flowers. Be sure to say what alleles the offspring will have and whether they are “everblooming” or “wild.”

Recurrent flowering roses such as the Hybrid Teas are perennial woody shrubs that

continuously produce new shoots. Basically, a shoot comprises a succession of 8 – 15

repeating units, each one consisting of a leaf, an axillary bud a node and an internode

(Blom & Tsujita 2003). The Modern Rose cultivars are largely sold as grafted plants

or cuttings and growth consists of the development of a number of branches on the

initial propagule as a result of the activity of axillary buds after release from

inhibition/apical dominance (see Section 4.5). These branches then produce a further

succession of axillary shoots (André 2003). Whether plants are grown commercially

for their blooms or are in managed gardens, it is common horticultural practice for

Explanation:

6 cos 34, 6 sin 34 trig