Genetics & Inheritance Lab Quiz

What is a genetic trait?

• A characteristic that is passed from parent to offspring

• A type of cell

• A random mutation

• A laboratory experiment.

Which of the following is an allele?

• A version of a gene

• A type of cell

• A complete set of chromosomes

• A laboratory tool

Fill in the blank: An organism with two identical alleles for a trait is ______.

• Heterozygous

• Homozygous

• Dominant

• Recessive

What is a recessive allele?

• An allele that is masked by a dominant allele

• An allele that is always expressed

• A type of cell

• A laboratory tool.

The ability to roll the tongue upward from the sides is a _______ trait.

• Recessive

• Dominant

Which of the following is a single-gene genetic trait observed in humans?

• A) Eye color

• B) Tongue rolling

• C) Height

• D) Skin color

Free earlobes are ______ over attached earlobes.

• Recessive

• Dominant

• Equal

• Inferior

What is the dominant eye color according to the presence of brown pigment?

• Blue

• Green

• Brown

• Hazel

What is the proper term for the ability to bend the thumb backward at least 45 degrees?

• A) Hyperextensibility

• B) Flexibility

• C) Rigidity

• D) Elasticity

Which trait is dominant

• Straight Hairline

• Widow's Peak

• Attached Earlobes

• No Dimples