Home of real teaching & learning
  • Full support for teachers
  • Focus on critical thinking
  • Engaging classroom activities
  • Integrated student eBook
  • Assessed tasks / qBank
  • Practice exam questions

The InThinking Guarantee: Our sites are written by expert practitioners and not by AI

See our AI policy

Disclaimer: InThinking subject sites are neither endorsed by nor connected with the International Baccalaureate Organisation.

Don't miss out, find out!

Using DNA similarities -Model answers (Activity 2)

Species A: CATCATCATCATCATCATCATCATCATCAT Species B: CATCATTACTACTACTACCATCATCATCAT Species C: CATCATTACTACTACTACCATCATTATCAT In the DNA of these species there looks to have been two mutations. Of course both of these mutations could have happened in reverse. TAC could have become CAT and T could have become C. Is it possible to identify which base sequence came first? The quick answer: Using a cladogram, yes,it is...

Help