Gene flow or migration is the transfer of alleles or genes from one population to another. select the combination of facts that indicate the occurrence of gene flow in the fugate family. i. four of the fugate's seven children had blue complexions. ii. travel in and out of this area was rare in the 1800's, but is more common now. iii. according to doctors, occurrence of the condition is rarely seen anymore. iv. methemoglobinemia at 10-20 percent of hemoglobin can cause blue skin without more serious symptoms.
a) i. and iv.
b) i. and iii.
c) iii. and iv.
d) ii. and iii.

The tasmanian devil, a marsupial carnivore, is facing extinction due to devil facial tumor disease (dftd) which causes bulging cancerous lumps and lesions to erupt around the face and neck — often causing enough deformation to make seeing or eating difficult. dftd has evolved into a contagious cancer, a trait that is unique among cancers. devil mating behavior involves biting around the head and neck, allowing cells from one individual — especially cells from the crumbly dftd tumors — to be transferred to the wounds or face of a new individual. this marsupial was once found across australia, but sea levels rose, isolating the tasmanian population, while the australian population went extinct. what would be an outcome of genetic isolation that is likely to have impacted the spread of dftd? a) reduced territory puts diseased individuals in greater contact with non-diseased ones. b) inbreeding results in less variation in facial features so the cancer is generally fatal. c) genetic isolation has made it difficult for scientists to develop a vaccine against dftd. d) the lack of genetic variation in the immune system of tasmanian devils minimizes resistance to the disease.

What organ systems are working to you cool down after a workout?

What is a sex-linked genetic disorder that disrupts the blood's ability to clot? a.achondroplasia b.huntington's disease c.hemophilia d.albinism