Cystic fibrosis is a disorder that causes the mucus glands to produce very thick mucus. Problems with the respiratory and digestive
systems often occur in individuals with this condition. Like many disorders, cystic fibrosis occurs when there is a simple change, or
mutation, in the DNA of a particular gene
According to the information above, genetic mutations
A
usually result in the release of excess mucus.
B.
can only cause diseases in plants and wild animals.
C.
can contribute to or cause diseases in humans
D. will always cause death in humans

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b.diffusion c. endocytosis d. exocytosisc. endocytosis

Has anyone taken the genetics unit test in connexus? not looking for answers, just a little bit what to expect and some with studying.

Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?