Which of the following would be considered a homozygous recessive genotype?
1.)green
2.)grey
3.)Tt
4.)two lower case t's

4; tt

Explanation: The two lowercase letters indicate that there are two recessive genes. If there is one uppercase letter and one lowercase letter, that would mean that it is heterozygous (as there is one dominant and one recessive gene).

carbon atoms, hydrogen, oxygen, and nitrogen.