Type 1 fucosidosis is a rare human disease. Patients cannot hydrolyze the disaccharide fucose, and as a result have severe neurological decline and die by age 6. The disease is due to a defect in the gene that encodes the lysosomal enzyme that breaks down fucose (α-1-fucosidase), and is inherited in an autosomal recessive manner. Jane and John, who are both unaffected, have a child who has Type 1 fucosidosis. What is the probability that their next child will also have the disease?

According to kin selection and Hamilton’s rule, a person should sacrafice their own life to save the life of

The early Earth atmosphere is thought to have lacked which of the following gasses?

A human cell contains 23 pairs of chromosomes for a total of 46. If it divides by meiosis, the result will be

When we use the Shannon diversity index to calculate the effective number of species, we are determining how many species would provide that same diversity value:

The effect of inbreeding is __________.

A cause of extinction that has been caused, at least in part, by humans is

A tropical deciduous forest, a hot desert, and the tundra are examples of

A human cell contains 23 pairs of chromosomes for a total of 46. If it divides by meiosis, the result will be

A nonprofit conservation organization receives a sizeable donation and decides to purchase several thousand acres of “high desert” in southern California. This particular type of desert has an intermediate level of species diversity and few unique species. However, much of the original areas of high desert have been converted to suburban housing and shopping. The decision by the nonprofit to preserve this area was most likely based upon what conservation strategy?