You could have made sure the books were the same weight and your friends could have done it at the same time as you
It took 1649 <span>took </span><span>for the world population to double, going from .25 billion people to .50 billion people.</span> years.
Answer:
A
Explanation:
For a recessive gene to affect the child they must inherit two recessive alleles because if a dominant allele is inherited than the dominant trait will be the one that is expressed in the child. The only way to get two recessive alleles is to inherit one from both parents so the father must also carry the recessive allele. This means A must be the correct answer.
