Genes and Heredity

The passing of traits from parents to offspring is called

• heredity
• deoxyribonucleic acid, DNA
• cloning
• precipitation

The traits of an organism are passed to its offspring on small coded strands of DNA material called

• meiosis
• recessive traits
• genes
• heredity

James Watson and Francis Crick are the scientists who discovered

• mutated cells
• the double helix structure of DNA
• that there are dominant and recessive genes
• evolutionary traits in human beings

During sexual reproduction, each parent contributes

• a double helix of chromosomes
• one strand of chromosomes, or half of the new organism's DNA
• a dominant gene and a recessive gene
• multiple mutated cells

If purple flowers are dominant in a plant and white flowers are recessive in that plant, then when the purple-flowered plants with two dominant genes are mated with the white-flowered plants with two recessive genes, the first generation of offspring should have

• 100% white flowers
• 75% purple flowers and 25% white flowers
• 50% purple flowers and 50% white flowers
• 100% purple flowers

A cell created by cloning is genetically

• identical to its parent
• identical to its stem cell
• unique because it is a mixture of DNA
• half like its father and half like its mother

Every DNA molecule is made up of molecules called

• chromosome quads
• mutational pairs
• nucleotides
• mitochondria 

How many pairs of chromosomes do human cells have?

• 100,000
• 23
• 14
• 46

A woman dyes her hair. Her new hair color is an example of what kind of trait?

• Acquired
• Inherited
• Learned

Two rams are fighting and one loses a horn. What kind of trait is this?

• Inherited
• Acquired
• Learned