Genetics

Two individuals that are heterozygous for curly hair (H) reproduce. Use the Punnett square to determine the probability that their offspring will express the recessive trait of straight hair (h).

• A. 0%

• B. 25%

• C. 50%

• D. 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

The pedigree below shows a two generation family. Based on the information shown in the pedigree, what is the probability of individual II-1 being heterozygous?

• A. 25%

• B. 50%

• C. 75%

• D. 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Joseph created the punnett square. Which of the following correctly states the offspring probabilities?

• 100% heterozygous

• 50% heterozygous, 50% homozygous dominant

• 50% heterozygous, 50% homozygous recessive

• 75% homozygous dominant, 25% homozygous recessive

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Use the Punnett square to determine the probability of having a homozygous recessive offspring if one parent is homozygous dominant and one parent is homozygous recessive.

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Use the pedigree below to answer the following question. What is the probability of individuals II-1 and II-2 having heterozygous offspring?

• 0%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Use the pedigree below to answer the following question. What is the probability that individual II-2 is homozygous for the dominant trait?

• 0%

• 25%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Use the pedigree below to answer the following question. If the genotype for individual I-2 is rr, what is the genotype for individual I-1?

• Rr

• RR

• Rr or rr

• RR or Rr

Tags

NGSS.HS-LS3-1

The Punnett square below is missing the genotype for one of the parents. Which of the following correctly identifies the missing genotype of the second parent that produced this cross?

• rr

• Rr

• RR

• RR or Rr

Tags

NGSS.HS-LS3-1

Which Punnett square represents a 50% probability of having homozygous dominant offspring?

• 
• 
• 
• 

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which Punnett square represents a 50% probability of having heterozygous offspring?

• 
• 
• 
• 

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2