Assume you have a pure breeding mutant donkey that has very large teeth and very large ears. Both phenotypes are completely recessive to the normal phenotype and each is controlled by different genes that assor independently. You crsoss your donkey to a pure breeding normal donkey and inter-cross the F1 progeny.
What is your expected phenotype ratio?
A) 1:1:1;1
B) 9:3:3:1
C) 2:1:2:1
D) 1:2:1