Unit 5 - DNA & Genetics

What is the genetic material of ALL organisms?

• RNA

• DNA

• mitochondria

• mRNA

What is the section of DNA on a chromosome that contains instructions for making specific proteins?

• gene

• DNA

• base pair

• double helix

Base pair matching rules for DNA are as follows

• A-T & C-G

• A-C & T-G

• A-G & T-C

• T-C & A-G

The best scientific description for the shape of DNA is:

• double helix

• spiral staircase

• twisted ladder

• spiral zipper

A & T match with __________ hydrogen bonds while C & G match with __________.

• 2 & 3

• 3 & 2

• 1 & 2

• 3 & 4

A typical human cell contains how many PAIRS of chromosomes?

• 23

• 46

• 27

• 64

A mutation occurs when a gene is _________________.

• permanently changed

• temporarily altered

• intermittently organized

• desperately ineffective

The passing of traits from parent to offspring is defined as...

• heredity

• alleles

• genetics

• recessive

What are alternate forms that a gene may have for a single trait; can be dominant or recessive?

• alleles

• heredity

• DNA

• RNA

What is a trait that covers over or masks another form of that trait?

• dominant

• recessive

• homozygous

• heterozygous