Understanding DNA and Heredity

What is heredity?

• The passing down of traits from parent to offspring

• The process of DNA replication

• The study of genetics

• The interaction between genes and the environment

Which of the following is NOT a trait of Spike?

• Patterns on his body

• His size

• His appetite for rats

• His ability to reproduce asexually

What is the role of DNA in living organisms?

• Determines physical traits only

• Provides energy for cells

• Regulates gene expression

• Codes for traits and essential cellular functions

Which of the following is NOT one of the DNA bases?

• Adenine

• Thymine

• Cytosine

• Glutamine

In DNA bases pairing, (a)   pairs with (b)   , and (c)   pairs with (d)   .

• A with T, C with G
• A with C, T with G
• A with G, C with T
• A with T, C with C

What is the structure of DNA called?

• Double helix

• Triple helix

• Spiral staircase

• Twisted ladder

Genes code for _____.

How many chromosomes do humans have?

• 23

• 46

• 69

• 92

Where do humans inherit their chromosomes from?

• Mother only

• Father only

• Both mother and father

• Randomly from other individuals

What is the purpose of chromosomes in the body?

• To store DNA

• To regulate gene expression

• To produce proteins

• To organize DNA during cell division