In fruit flies, curved wings are recessive to normal wings, and ebony body is recessive to gray body. a cross was made between two true-breeding flies, one with normal wings and gray body, the other a fly with curved wings and ebony body. the f1 offspring were thus hybrids. these hybrids were crossed to each other (dihybrid cross). for observations, 120 flies were collected. if these traits are independently assorting, what is the expected number of flies with curved wings and gray body

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Proteins are the workhorses of the cell, controlling virtually every reaction within as well as providing structure and serving as signals to other cells. proteins are long chains of  amino acids  , and the exact sequence of the amino acids determines the final structure and function of the protein. instructions for that sequence are encoded in  genes  . to make a particular protein, a messenger ribonucleic acid (mrna) copy is made from the gene (in the process called  transcription  ), and the mrna is transported to the  ribosome  . protein synthesis, also called  translation  , begins when the two ribosomal subunits link onto the mrna. this step, called initiation, is followed by elongation, in which successive amino acids are added to the growing chain, brought in by transfer rnas (trnas). in this step, the ribosome reads the  nucleotides  of mrna three by three, in units called  codons  , and matches each to three nucleotides on the trna, called the anticodon. finally, during termination, the ribosome unbinds from the mrna, and the  amino acid  chain goes on to be processed and folded to make the final, functional protein