Can aa be a genotype or would it have to be aa

Hello! Good morning!

Answer-

First of all, you need to know what a genotype is. A genotype is the genetic constitution of an individual organism. Which means, aA, can not be a genotype.  

Hope this helps! Have a great day Sir/Ma'am.

-AcEdd

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs