Alleles are used by cells to make proteins. When an allele changes, the protein that the cell makes also changes. The new alleles cause the cell to make new proteins. How do you think new proteins affect the fitness of children?

1.They have no effect on fitness
2.They increase fitness
3.They decrease fitness
4.All of the above

Determine if the following statement is true or false. if true, choose true. if false, choose the rewording that is true. according to the law of independent assortment, alleles for each gene are inherited together so that they always stay together. according to the law of independent assortment, offspring express a combination of their parents' traits. according to the law of independent assortment, alleles for a characteristic split during meiosis and combine during fertilization. true according to the law of independent assortment, alleles for each gene are inherited independently so that no two alleles stay together.

Which of the follow describes a disadvantage secondary sources have compared to primary sources?

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water