Explain why two albino parents will not have any children with normal skin and hair color but two parents with normal skin and hair color could have an albino child

tyrosinase protein - make pigment. albino -must have two mutant tyrosinase genes. 
albino have all reccesive so they cannot make a normal skin and hair color baby
but two parents with normal skin and hair color could because the gene can have a mutation or the parents could have one reccesive gene

Humans can affect weathering and erosion in several ways.  humans cause  increases in acid rain and pollution, which increase the amount of  weathering  agents in the air and water, and then on land.for an easy answer: 1) acid rain2) pollution