Punnett Squares and Heredity

What is a Punnett square used for?

• Cooking recipes

• Weather forecasting

• Predicting genetic outcomes

• Solving math equations

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What are the two types of alleles in a heterozygous individual?

• Red and blue

• Big and small

• Happy and sad

• Dominant and recessive

What is the genotype of an individual with two dominant alleles?

• Homozygous dominant

• Incomplete dominance

• Heterozygous dominant

• Homozygous recessive

Tags

NGSS.HS-LS3-1

What is the phenotype of an individual with the genotype Aa?

• Heterozygous

• Dominant

• Recessive

• AA

Tags

NGSS.HS-LS3-1

If a pea plant with the genotype Tt is crossed with another pea plant with the genotype tt, what is the probability of their offspring having the genotype Tt?

• 100%

• 75%

• 50%

• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

How many squares are in a Punnett square for a dihybrid cross?

• 32

• 8

• 16

• 4

Tags

NGSS.HS-LS3-3

What is the difference between genotype and phenotype?

• Genotype and phenotype are the same thing.

• Genotype is the physical characteristics, while phenotype is the genetic makeup.

• Genotype is the genetic makeup, while phenotype is the physical characteristics.

• Genotype is only relevant for plants, while phenotype is only relevant for animals.

If a parent with the genotype Bb is crossed with another parent with the genotype bb, what is the probability of their offspring having the genotype bb?

• 100%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-3

Explain how Punnett squares can be used to predict the likelihood of specific traits in offspring.

• By organizing the possible combinations of alleles from the parents and determining the probability of each combination.

• By asking a psychic to predict the traits of the offspring

• By using a crystal ball to predict the traits of the offspring

• By flipping a coin to determine the traits of the offspring

Tags

NGSS.HS-LS3-3

Which of the following best describes an organism that has two identical alleles for a trait?

• Heterozygous

• Homozygous

• Dihybrid

• Monohybrid

Tags

NGSS.HS-LS3-1