Monohybrid Crosses and Pedigree Charts

Brown (B) is dominant over white (b). Which genotype is a purebred for brown fur?

• BB

• Bb

• bb

• All of the above

A couple has three brown-eyed children. The parents are brown-eyed (Bb). The allele for brown eyes is dominant over the allele for blue eyes. They believe the fourth child they have will be blue-eyed. Which statement below explains what actually will happen?

• The couple will have a blue-eyed fourth child.

• The couple will have a brown-eyed fourth child.

• They have a 75% chance of having a blue-eyed child.

• They have a 25% chance of having a blue-eyed child.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

What are the phenotype percentages of the offspring?

• 50 % Brown fur and 50% White fur

• 25 % Brown fur and 75% White fur

• 75 % Brown fur and 25% White fur

• 0% Brown fur and 100% White fur

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a pedigree chart, what does a vertical line connecting two generations represent?

• Siblings

• Marriage or mating

• Parent and child

• Unrelated individuals

What allele combination should go in the missing box?

• AA

• Aa

• aa

• none of these

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In cacti, long arms (A) are dominant to short arms (a).  Suppose 2 heterozygous cacti are crossed.  What percentage of their offspring are expected to have short arms?

• 0%

• 25%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Which of the following genotypes is a purebred?

• Bb

• Gg

• bb

• Dd

In monsters, blue hair is dominant to green hair. Which genotype(s) will produce blue hair? (Select ALL that apply)

• BB

• Bb

• bb

Tags

NGSS.HS-LS3-1

In monsters, blue hair is dominant to green hair. Which genotype(s) will produce green hair? (Select ALL that apply)

• AA

• Aa

• aa

In the punnett square, what is the probability for white fur?

• 0% (0/4)

• 25% (1/4)

• 50% (2/4)

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2