Answer:
brothers and sisters don't look exactly alike because everyone (including parents) actually has two copies of most of their genes. And these copies can be different. Parents pass one of their two copies of each of their genes to their kids.
Answer is D, all of the above.
Earth's Upper Atmosphere. And Volcanoes.
Explanation:
Answer: no, blood type AB has gennotype IA,IB while blood type o has the genotype II
