Why don't substitutions cause a change in the amino acid sequence of a protein

The amino acid is determined by a triplet of bases and the change to the base sequence is a gene mutation. Base substitution, addition and deletion changes the nucleotide sequence of DNA. Additional and deletion have a large effect on the amino acid sequence because of frame-shift. It alters every 3 base sequence which follows so forms completely new code after mutation. Substitution often has no effect i.e. silent mutation because different triplet may also code for the same amino acid. Substitution may also have a big effect on the amino acid sequence as it may produce stop codon. For example: the base sequence ATG mutated to ATT. This is a stop triplet, so the synthesis of protein would stop at this point. production of a non-functional protein.In terms of frameshift mutations you have deletion and insertion. Both of which change the amino acid sequence completely after rhe point of mutation.

Explanation:

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

b is dominant over the allele for the white fur.