The CFTR gene, on human chromosome 7, encodes an ion channel protein that regulates chloride ion concentrations. Mutations that disrupt CFTR function may lead to a disease called cystic fibrosis. How many copies of the CFTR gene are present in a cell that is... In G1 of the cell cycle
In G2 of the cell cycle
In a sperm cell
In prophase I of meiosis In a primary spermatocyte In a second polar body
In a recently fertilized zygote

When analyzing tree rings, what do scientists assume a thin ring indicates?

Which plate boundary causes plates to collide forming mountain ranges, volcanoes, and island arcs? give an example of this type of plate boundary. 2. at which plate boundary do rifts and mid-oceans ridges form? give an example of this type of plate boundary. 3. at which plate boundary do plates slide past each other while moving in opposite directions? give an example of this type of boundary.

First idea: suddenly, women were leaving their homes to cycle and socialize on country roads and city streets. —wheels of change, sue macy second idea: it was not a stretch for some cyclists to see the possibility of a larger role for women in the world. —wheels of change, sue macy what type of graphic organizer would best represent the connection between these two ideas? 1) a t-chart that separates ideas into two different categories 2) a chronology that shows 3) a sequence of several events a cause-and-effect graphic that shows how one idea led to another 4)a problem-solution graphic that presents a problem and a solution to the problem