Punnett Square

Why are Punnett squares used in genetics?

• To predict the probability of offspring inheriting particular traits

• To measure the size of DNA molecules

• To identify the sequence of genes

Tags

NGSS.HS-LS4-3

How many recessive alleles do you need in order for the recessive phenotype to show?

• 2

• 1

• 4

What does a capital letter represent in a genetic cross?

• A recessive allele

• A dominant allele

• A heterozygous allele

• A homozygous allele

What does a lowercase letter represent in a genetic cross?

• A dominant allele

• A recessive allele

• A codominant allele

• An incomplete dominant allele

If a homozygous dominant plant (TT) is crossed with a homozygous recessive plant (tt), what will be the genotype of the offspring?

• TT

• Tt

• tt

• TTT

Tags

NGSS.HS-LS3-1

Which of the following represents a homozygous genotype?

• Tt

• TT

• tT

• TtT

What are all the genotypes of a monohybrid cross between two homozygous recessive parents?

• tt

• TT

• Tt

What genotype would go in box 3?

• BB
• Bb
• bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What genotype would go in box 1?

• BB
• Bb
• bb

Tags

NGSS.HS-LS3-1

Do letters (Yy) represent phenotypes or genotypes?

• phenotypes

• genotypes

Tags

NGSS.HS-LS3-1