The both decrease genetic variation
Explanation:
Recessive alleles lack the power to express the phenotypic traits of an organism. In order for the specific trait to be expressed, 2 copies of the recessive allele or homogenous recessive genotype is needed in the organism.
The southern ocean is surrounded by 3 oceans
Answer:
extension- increasing the angle between two boned of the straightening of a limb.
Im sorry I only know the first one. :( Wish I could help 100%