The trait that will always be expressed if one copy of an allele is present.

• recessive

• dominant

• co-dominant

The trait that will be expressed only if two copies of the allele are present.

• recessive

• dominant

• co-dominant

The information that is passed from parent to offspring:

• cell

• gene

• trait

• nucleus

Genes come in pairs because if one doesn't work, we have a spare.

• True

• False

Genes come in pairs because we get one copy from mom and one copy from dad.

• True

• False

Genes come in different forms.

• True

• False

Being able to roll the tongue is a dominant trait (T). Not being able to roll the tongue is a recessive trait (t). A persons genes are tt. Which trait would they have?

• Able to roll the tongue

• Not able to roll the tongue

• Can't tell

Being able to roll the tongue is a dominant trait (T). Not being able to roll the tongue is a recessive trait (t). A persons genes are Tt. Which trait would they have?

• Able to roll the tongue

• Not able to roll the tongue

• Can't tell

Being able to roll the tongue is a dominant trait (T). Not being able to roll the tongue is a recessive trait (t). A persons genes are TT. Which trait would they have?

• Able to roll the tongue

• Not able to roll the tongue

• Can't tell

Black hair (H) is a dominant gene in guinea pigs and black yellow (h) is recessive. What color hair would a guinea pig have if it got a recessive gene (h) from mom and a recessive gene (h) from dad?

• Black hair

• Yellow hair

• Can't tell