the sex of the egg the age of the egg the size of the egg the genes of the egg
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of these determines whether a fertilized egg develops into a toad, a snake, or a lizard?
Possibilities:
- the sex of the egg
- the age of the egg
- the size of the egg
- the genes of the egg

the genes of the egg