Punnett Squares

What is a Punnett square used for?

• To calculate the speed of an object

• To predict the outcome of a coin flip

• To predict the possible genotypes of offspring from two parents

• To measure the temperature of a substance

If you flip a coin, what is the probability of getting heads?

What does the term "genotype" refer to?

• The physical appearance of an organism

• The set of genes in our DNA which is responsible for a particular trait

• The number of chromosomes in a cell

• The age of an organism

Tags

NGSS.HS-LS3-1

Who are considered the "parents" in a Punnett square?

• The two organisms being crossed to predict the genotype of their offspring

• The scientists conducting the experiment

• The first generation of offspring

• The cells in an organism

Tags

NGSS.HS-LS3-1

What are "offspring" in the context of genetics?

• The cells produced after cell division

• The result of a chemical reaction

• The children or products from the parents in a genetic cross

• The tools used in a laboratory

Tags

NGSS.HS-LS3-1

In a Punnett square, what does a capital letter represent?

• A recessive trait

• A dominant trait

• The parent's genotype

• The offspring's phenotype

If two parents are heterozygous for a trait (Bb), what is the probability of their offspring being homozygous recessive (bb)?

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

What does it mean if an offspring's genotype is "heterozygous"?

• It has two identical alleles for a trait

• It has two different alleles for a trait

• It does not have any alleles for a trait

• It has more than two alleles for a trait

What is the probability of producing a heterozygous offspring (Bb) when one parent is homozygous dominant (BB) and the other is homozygous recessive (bb)?

Tags

NGSS.HS-LS3-3

In the Punnett square shown, what must the genotype of the missing parent be?

• BB
• Bb
• bb
• Tt

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2