3.00 Human Genetic Variation

Mr. Jones worked in an asbestos plant in his early 20's-30's. At age 60, he now has malignant mesothelioma, a cancer that affects the tissue lining the lung. This would be a/an:

• Environmental factor

• Hereditary factor

• Old age factor

• Multifactorial

BEth has tested positive for BRCA 1. This is an example of which type of factor?

• Environmental factor

• Hereditary factor

• Old age factor

• Multifactorial

Genetic traits that cannot be changed are:

• Blood type, biological sex

• Height, weight

• hair color

• eye color

Traits that are influenced by genetic & environmental factors include all of the following except:

• Height, weight

• Hair color

• Eye color

• Biological sex, blood type

Genetic variation makes this procedure more difficult to accomplish.

• tissue and organ transplant

• speech therapy

• genetic counseling

The ultimate source of variation in humans is

• envronment

• number of cells in body

• differences in DNA sequences

• diseases in an infant

We can expect to find how many base differences in DNA sequence between any two people?

• one million

• two thousand

• four billion

• three million

Ronnie has sickle cell anemia (disease). He has this disorder by:

• receiving sickle cell trait from both parents

• receiving sickle cell trait from his mother

• receiving sickle cell trait from his father

• receiving sickle cell trait from his aunt

Loretta has the sickle cell trait. She got this by:

• receiving the sickle cell trait from a blood transfusion

• receiving the sickle cell trait from both parents

• receiving the sickle cell trait from her mother

• receiving the sickle cell trait from her grandparent

A harmful effect of inheriting genetic disorders is

• passing a gene to your children

• surviving the environment

• not passing the gene to your children