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.
Drag is another one i actually did this project in 5th grade so i know some of this hope this helps.
Answer:
The flagpole shadow got longer each mouth as autumn turned to winter
Explanation:
Answer:
Sympathetic Nervous System
Explanation:
The main function of the sympathetic nervous system is to stimulate the fight or flight response.
