Study of Traits Quiz

How many chromosomes does one inherit from each parent?

• 23 from dad and 23 from mom

• 46 from dad and 46 from mom

• 23 from dad only

• 46 from mom only

What are alleles?

• Different versions of genes for the same trait

• A pair of homologous chromosomes

• A specific type of chromosome

• A gene for eye color

What is an example of a trait that can have different alleles?

• Eye color

• Number of chromosomes

• Size of a chromosome

• Shape of a chromosome

What does a dominant gene do to a recessive gene?

• It combines with the recessive gene

• It prevents the recessive gene from being expressed

• It duplicates the recessive gene

• It has no effect on the recessive gene

How is a recessive gene expressed?

• When there is only one copy of it

• When it is combined with a dominant gene

• When there are two copies of it

• Regardless of the presence of a dominant gene

What is the symbol notation for a dominant gene?

• A lower case letter

• A number

• A symbol

• An upper case letter

What is the symbol notation for a recessive gene?

• An upper case letter

• A lower case letter

• A number

• A symbol

What must be true for a recessive trait to be expressed?

• Having one dominant allele

• Having one recessive allele

• Having two dominant alleles

• Having two recessive alleles

What is the genotype for a dominant trait regarding the presence of a gap between teeth if "g" represents the gap gene?

• gg

• Gg

• GG

• None of the above

What is the genotype for a recessive trait regarding the presence of a gap between teeth if "g" represents the gap gene?

• gg

• Gg

• GG

• None of the above