Dihybrid punnett squares

B = brown eyes
b = blue eyes
What is true about these two brothers that have brown eyes?
One has genotype BB the other Bb.

• they have same phenotype and genotype
• they have different genotypes and phenotypes
• they have same phenotype but different genotypes
• they have same genotype but different phenotypes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If you have a parent who has GgBb as their genotype, what are the possible alleles they could donate to their gametes?

• GB, Gb, gB, gb
• GB, GB, gb, gb
• Gb, Gb, Gb, GB
• GG, BB, gg, bb

Tags

NGSS.HS-LS3-2

How many offspring will you have in a dihybrid cross? 

• 4
• 8
• 16
• 5

T4 - Black fur in mice (B) is dominant to brown fur (b). Short tails (T) are dominant to long tails (t). What percentage of the offspring of the cross BbTt x BBtt will have black fur and long tails?

• 0%
• 25%
• 50%
• 100%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

T4 - What genotype is missing from this Punnett Square?

• RrYy
• RRYY
• rryy
• RrYY

Tags

NGSS.HS-LS3-1

T4 - Based off this Punnett Square, what fraction of the offspring will have wrinkled, yellow seeds?

• 9/16
• 3/16
• 1/16
• 16/16

Assume mom's gametes are on the left, what is her genotype?

• TTZz
• TtZz
• ttZZ
• TtZZ

Tags

NGSS.HS-LS3-1

Assume dad's gametes are on top, what is his genotype?

• AAPP
• AaPp
• aaPP
• Aapp

In watermelons, green rinds (G) are dominant to striped rinds (g).  What is the genotype of a heterozygous green watermelon?

• GG
• Gg
• gg
• green

Tags

NGSS.HS-LS3-1

Long tongues (T) are dominant to short tongues in green tree frogs.  What is the probability that two frogs that are heterozygous for long tongues could produce offspring with short tongues?

• 100%
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3