Quarter 2 Review

What are the main components of DNA?

• Nitrogen bases, phosphates, and deoxyribose sugars.
• Nitrogen bases, salts, and deoxyribose sugars.
• Deoxyribose sugars, phosphates, and carbon bases.
• Thymine, deoxyribose sugars, and carbon bases.

Human cells have how many chromosomes?

• 12
• 48
• 23
• 46

How many parents are required for asexual reproduction?

•  one
• two
• six
• four

Organisms that reproduce asexually generally have offspring that are 

• unicellular. 
• multicellular. 
• genetically varied. 
• genetically identical. 

In the system shown, there are 80 particles, all in region A (the left half of the box). No extra particles can enter the system. When the system is in equilibrium, what will be true of the particles?

• Since there are no y particles, the system is already in equilibrium.
• Due to the constant motion of particles, there will never be equilibrium.
• In equilibrium there will be exactly 40 x particles in A and 40 x particles in B and those numbers will remain constant.
• In equilibrium, there will be approximately 40 x particles in A and 40 x particles in B, and those numbers will fluctuate but will remain near 40.

Fred is a playful poodle with long, curly black fur.  He enjoys fetching balls and sleeping on his soft bed. His owner took him to the groomers for a nail trim and hair cut. Which characteristic could be inherited by Fred's puppies?

• Trimmed Nails
• Pom pom haircut
• Curly fur
• Sleeping on a soft bed

What is the phenotype of the offspring? (A-Brown hair; a-blond hair) 

• 50 % Brown Hair and 50% Blond Hair 
• 25 % Brown Hair and 75% Blond Hair 
• 75 % Brown Hair and 25% Blond Hair 
• 0% Brown Hair and 100% Blond Hair 

B = brown fur  b = white fur
In the Punnett square, what is the probability for white fur? 

• 0%
• 25%
• 50%
• 75%

The image you see is a mammoth.  Which trait most suggests that the mammoth was adapted to live in a cold climate?

• Its thick, furry coat
• Its long, flexible trunk
• Its sharp, curved tusks
• Its broad, powerful body

If a portion of Strand I of DNA has the base sequence GATCAC, what is the sequence of bases on the complementary Strand II?

• GATCAC
• CUAGUG
• CTACAC
• CTAGTG