Gene expression in eukaryotes can be regulated at various levels. Certain mutations in flies may cause them to develop an extra set of legs or wings. , which determine the formation and arrangement of body parts in multicellular organisms, control gene expression by regulation of .

Which scientist(s) is/are given credit for making the first recorded observations of microorganisms, such as bacteria and protists, with their microscope?

If the frequency of the p allele is .63 in the population then what is the frequency of the q allele?

Which of the following statements is true? a. there are more chromosomes in an organism than there are genes. b. there are more genes in an organism that there are chemical bases. c. dna is made of sugar, phosphate, and carbon. d. genes are found in specific locations on a chromosome.