All of them, they are all very important factors to test for the identifying
c. It never changes during the experiment.
I am no expert but I think the correct answer is C.
Lethal alleles cause the death of an organism prenatal or after the birth. Lethal alleles are usually a consequence of a mutation and they can be recessive, dominant or conditional. Since the lethal dominant alleles are harmful whether they are carried in homozygous (e.g.AA) or heterozygous (e.g.Aa) form, a strong selection against them is present and thus these alleles are much more rare.
Both plant and animal cells have a nucleus and mitochondria
