In one species of plant, red flowers (R) are dominant to white flowers (). What are the genotypes
of the parent plants that are crossed when 50% of the offspring are heterozygous and 50% are
homozygous recessive?

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.