Punnett Squares and Pedigrees

While observing a litter of guinea pigs, Jack and Jill noticed that they had a variety of brown and white coats. They knew the guinea pigs had the same parents and that they were all from the same litter. Which best explains why they had different coat colors?

• they received an exact copy of both parents' DNA

• they randomly received DNA from only one parent

• the coat color is random and not influenced by parents

• they received different combinations of DNA from both parents

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following correctly states the genotype probabilities for the offspring of the parents shown in this punnett square?

• 50% heterozygous 50% homozygous dominant

• 50% heterozygous 50% homozygous recessive

• 50% heterozygous 25% homozygous recessive 25% homozygous dominant

• 100% heterozygous

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Which of the following correctly states the genotype probabilities for the offspring of the parents shown in this punnett square?

• 50% heterozygous 50% homozygous dominant

• 50% heterozygous 50% homozygous recessive

• 50% heterozygous 25% homozygous recessive 25% homozygous dominant

• 100% heterozygous

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Which of the following correctly states the genotype probabilities for the offspring of the parents shown in this punnett square?

• 50% heterozygous 50% homozygous dominant

• 50% heterozygous 50% homozygous recessive

• 50% heterozygous 25% homozygous recessive 25% homozygous dominant

• 100% heterozygous

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Julie learned that curly hair is dominant over straight hair. She began to wonder if two parents with curly hair could produce offspring with straight hair. Which of the following punnett squares shows curly haired parents that can produce offspring with straight hair?

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Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The pedigree is tracing the expression of a recessive trait for generations I and II. Both parents carry the trait but only one parent presents the trait.

Based on the information in the pedigree what is the genotype for individual I-1?

• hetyerozygous

• homozygous recessive

• homozygous dominant

• none of the provided

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The pedigree is tracing the expression of a recessive trait for generations I and II. Both parents carry the trait but only one parent presents the trait.

Based on the information in the pedigree what is the genotype for individual I-2?

• hetyerozygous

• homozygous recessive

• homozygous dominant

• none of the provided

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The pedigree is tracing the expression of a recessive trait for generations I and II. Both parents carry the trait but only one parent presents the trait.

Based on the information in the pedigree what is the genotype for individual II-3?

• hetyerozygous

• homozygous recessive

• homozygous dominant

• none of the provided

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The pedigree is tracing the expression of a recessive trait for generations I and II. Both parents carry the trait but only one parent presents the trait.

Based on the information in the pedigree what is the genotype for individual II-2?

• hetyerozygous

• homozygous recessive

• homozygous dominant

• none of the provided

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which image represents the type of cellular reproduction responsible for the production of reproductive cells?

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Tags

NGSS.HS-LS3-2