How many total amino acids are there in the sequence for human cytochrome-c? 104 amino acids.
Compare the human amino acid sequence with ONE other animal of your choice by counting the number of times an amino acid in that animal’s cytochrome-c is different from the amino acid in that same position of the human sequence.
List the animal you chose and how many differences there were.
Could this be used as evidence that humans and this animal share a common ancestor? Explain.
Animal choices: Rhesus monkey..... - - - - - - - - G D V E K G K K I F I M K C S Q C H T V E K G G K H K T G P N L H G L F G R K T G Q A P G Y S Y T A A Horse ........... - - - - - - - - G D V E K G K K I F V Q K C A Q C H T V E K G G K H K T G P N L H G L F G R K T G Q A P G F T Y T D A Pig, cow, sheep... - - - - - - - - G D V E K G K K I F V Q K C A Q C H T V E K G G K H K T G P N L H G L F G R K T G Q A P G F S Y T D A Dog.............. - - - - - - - - G D V E K G K K I F V Q K C A Q C H T V E K G G K H K T G P N L H G L F G R K T G Q A P G F S Y T D A Gray whale ...... - - - - - - - - G D V E K G K K I F V Q K C A Q C H T V E K G G K H K T G P N L H G L F G R K T G Q A V G F S Y T D A Rabbit............ - - - - - - - - G D V E K G K K I F V Q K C A Q C H T V E K G G K H K T G P N L H G L F G R K T G Q A V G F S Y T D A Kangaroo.......... - - - - - - - - G D V E K G K K I F V Q K C A Q C H T V E K G G K H K T G P N L N G I F G R K T G Q A P G F T Y T D A Chicken, Turkey... - - - - - - - - G D I E K G K K I F V Q K C S Q C H T V E K G G K H K T G P N L H G L F G R K T G Q A E G F S Y T D A Penguin........... - - - - - - - - G D I E K G K K I F V Q K C S O C H T V E K G G K H K T G P N L H G I F G R K T G Q A E G F S Y T D A Pekin duck........ - - - - - - - - G D V E K G K K I F V Q K C S Q C H T V E K G G K H K T G P N L H G L F G R K T G Q A E G F S Y T D A Snapping turtle... - - - - - - - - G D V E K G K K I F V Q K C A Q C H T V E K G G K H K T G P N L N G L I G R K T G Q A E G F S Y T E A Bullfrog.......... - - - - - - - - G D V E K G K K I F V Q K C A Q C H T C E K G G K H K V G P N L Y G L I G R K T G Q A A G F S Y T D A Tuna.............. - - - - - - - - G D V A K G K K T F V Q K C A Q C H T V E N G G K H K V G P N L W G L F G R K T G Q A E G Y S Y T D A
Animal chosen: Rhesus monkey
Number of differences: 3
This comparison could be used as evidence that humans and Rhesus monkeys share a common ancestor because the similarities in the cytochrome-c amino acid sequences suggest a close genetic relationship between the two species. The small number of differences in the sequence supports the idea that humans and Rhesus monkeys diverged from a common ancestor relatively recently in evolutionary history.