To be able to write your own cover letter, read the generic letter of recommendation samples given below. The letter of recommendation is used in many fields, especially in the field of education.
This supports the idea that in embryos from wild-type mothers, dpp H~- mutations cause the transformation of dorsal into ven-tral epidermis. If tissue determined to become dorsal epidermis dies in the dpp rim-null embryos, then one should not see ventral or lateral tissue formed in the double-mutant combination.
The neurobiology of drosophila mating behavior is an area of research that has studied in detail and has elucidated the genetic basis for behavior. The male courts a female based on pheromones from the female and previous experience courting other potential mates.