Monohybrid Crosses and Pedigree Charts

T - tall and t = short

In the punnett square below, what belongs in the missing square

• tt

• Tt

• Bb

• TT

Tags

NGSS.HS-LS3-1

Which of the following genotypes is heterozygous?

• Bb

• BB

• bb

• B

Which of the following is homozygous recessive?

• Tt

• tt

• TT

• T

What are the possible genotypes for this cross?

• TT = 25% Tt= 50% tt=25%

• all tall

• TT= 75% tt = 25%

• Tt = 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

This is an example of a ______________.

• phenotype

• genotype

• xenotype

• base pairs

Tags

NGSS.HS-LS3-1

This is an example of _____________.

• phenotype

• heliotype

• DNA

• genotype

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A homozygous dominant round seeded plant is crossed with a homozygous recessive wrinkled seeded plant. What are the genotypes of the parents?

• RR X rr

• Rr X rr

• rr X rr

• RR X Rr

Tags

NGSS.HS-LS3-1

In labrador retrievers the allele for a black coat color (B) is dominant over the allele for a brown coat color (b). If a brown labrador retriever is crossed with a heterozygous black labrador retriever, which of the following genotypic ratios can be expected?

• 0 BB: 2 Bb: 2 bb

• 1 BB: 2 Bb: 1 bb

• 2 BB: 0 Bb: 2 bb

• 2 BB: 1 Bb: 0 bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

T = tall an t = short

TT and Tt would result in the following phenotype

• short

• tall

• medium sized

• neither tall or short

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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-LS3-2

NGSS.HS-LS3-3