Understanding DNA and Genetics

What is the primary function of DNA in our bodies?

• To provide energy

• To fight infections

• To encode genetic instructions

• To store nutrients

Which of the following is NOT determined by genes?

• Nose shape

• Hair color

• Favorite food

• Earlobe attachment

How many genes make up the human genetic code?

• 10,000

• 20,000

• 30,000

• 40,000

What makes each person's DNA unique?

• The number of genes

• The color of the DNA

• The sequence of bases

• The size of the DNA

What tool is used to predict the inheritance of traits?

• Chromosome chart

• DNA sequence

• Punnett square

• Genetic map

In a Punnett square, what does a capital letter represent?

• A recessive trait

• A dominant trait

• A mutated trait

• A neutral trait

If a parent has blue eyes, what is the genetic representation?

• Bb

• BB

• bB

• bb

What is the probability of a child having blue eyes if both parents have Bb genes?

• 75%

• 50%

• 0%

• 25%

Which eye color is dominant, according to the Punnett square example?

• Blue

• Green

• Brown

• Hazel

What is the chance of a child having brown eyes if one parent is BB and the other is Bb?

• 50%

• 0%

• 100%

• 25%