Group 1 will be looking at Hairy Tree Rats from Island 1. These rats have evolved Rusty coloured coats to blend in with the bark of the appropriately named Rust Tree. The other two coat colours seen on the island are Brown and Tan. Again, these blend in with the bark of the Rust Tree, but not as well as the Rusty coat colour.

You need to work out the genetic relationships for coat colours; assume all rats are from true breeding lines (unless the litter is specified).

For coat colour you will use the Punnett Square calculator to mock up crosses and you will need to determine:

You should make notes as you go along and you can save crosses you mock up by copying and pasting into a Word document.

You need to think about genotypes and phenotypes

Assume that the rats are diploid

Answer all of the questions by submitting your answers online in the post-practical assessment quiz on Canvas. This is set up so that you can submit answers multiple times up to the deadline, and your final entry will be the one marked.

'Knowledge Points' are included to prompt you to question the data you are generating and that you are applying in the genetic analysis (you do not submit answers to Knowledge points but you should take notes about them and consider them when answering the questions).

You may wish to open the assessment now so you can see the questions you need to answer as you work through the next few pages. The assessment can be found in CMB1005 on Canvas in the Strand D under Genetics Practical 3: gene Linkage. If you cannot see your assessment please email Dr Jeremy Brown.