In mammals, females have two X chromosomes and males have a single X chromosome in addition to a Y chromosome. Thus, females have a ‘double dose’ of all the genes on the X chromosome. Females address this imbalance by inactivating one of the two X chromosomes in every cell. How do the cells do this?

Round  \(12.345678\)  to the nearest hundredth.   You do not need to submit work for this problem.

Evaluate  \(3+2(x-1)\)  when  \(x=2\).

Order the following pair of numbers using  \(,\text{ or }=\).   \(-|-2|\)  \(|-2|\)

Use the distributive property and combine like terms to simplify   \(7(3x+2)-4(5x-3)\)   Use the equation editor to enter your answer (click on the \(\sqrt{x}\) to open the equation editor).

Divide:   \(\dfrac{9}{20}\div\dfrac{3}{5}\)   Give your answer as a reduced fraction, an improper fraction may be necessary.   Use the equation editor to enter your answer (click on the \(\sqrt{x}\) button to open the equation editor).

Determine whether the equation demonstrates the identity property of addition or multiplication:   \(-5+0=-5\)   You do not need to submit work for this problem.    

What is the ultimate goal of reading?

Match the correct letter with corresponding structures labeled in the diagram below.

Mention at least four sub types of synovial joint with one example of each.