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.
Drosophila or fruit fly any small dipterous fly (see DIPTERAN of the genus Drosophila, which has been used extensively in genetical investigations. D. melanogaster is probably the best-understood animal in terms of inheritance studies.