Basics of Genetics

How many chromosomes do humans have?

• 23

• 46

• 92

• 12

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Chromosomes are best described as:

• Short strands of DNA

• Long strands of DNA packaged together

• Single strands of RNA

• Proteins that carry DNA

What is the memory trick for remembering what chromosomes do?

• Chromosomes = Carry Recipes Of Many Organisms Safely

• Chromosomes = Carry Recipes Of Many Organisms Securely

• Chromosomes = Carry Recipes Of Many Organisms Swiftly

• Chromosomes = Carry Recipes Of Many Organisms Slowly

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Which of the following is NOT a trait controlled by genes?

• Eye color

• Hair color

• Height

• Favorite food

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If a pea plant has two genes (alleles) for purple flowers, this is called what?

• homozygous

• heterozygous

• hybrid

• recessive

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What is an allele or gene that requires two copies to be expressed?

• reversed

• recessive

• recombinant

• retrograde

Who was the Austrian monk that figured out how traits were passed from one generation to the next using pea plants?

• Reginald Punnett

• Henrietta Lacks

• Francis Crick

• Gregor Mendel

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What are versions of genes

• genetics

• heredity

• eggs

• alleles

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If a pea plant has a gene for white flowers and a gene for purple flowers, this is called what?

• homozygous

• pure-breeding

• heterozygous

• recessive

What is an allele or gene that requires only one copy to be expressed?

• reformed

• physical

• recessive

• dominant