Answer:
Mutations can create entirely new alleles in a population which changes the allele frequencies of a gene pool.
Since the aphotic zone does not recieve sunlight it relys on the photic zone for the sunlight which in terms it does penetrate.
Answer:
chromosomes
Explanation:
chromosomes which consist of genes which consist of DNA can pass on traits from parent to child.
it basically works by depending on the gender of the child it can inherit certain traits from its parents
so say the hemophilia is an XX being from the mom and to get the mutation you would need the X that has the mutation and either an X or Y from the dad.
I dont know if hemophilia affects X or Y but that is how the mutation would be passed on.
Muscle spasms is the answer i belive because you dont have the control
