Punnet Square Lesson

Punnett Squares are used to

• show dominant alleles only in a genetic cross

• show only recessive alleles in a genetic cross

• show all the possible outcomes of a genetic cross

• show all of Mendel's discoveries about genetic crosses

In the punnett square, what is the probability for white fur?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the percent chance that the offspring will have SHORT hair?

• 0%

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

T - tall and t = short. In the Punnett square below, what belongs in the missing square (a)  

• tt

• Tt

• Bb

• TT

Tags

NGSS.HS-LS4-3

Complete the punnett square

a

b

c

d

t t

T t top row

T T

T t bottom row

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the probability of a purple-horned unicorn if a heterozygous pink-horned unicorn is crossed with a heterozygous pink-horned unicorn? (a)  

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Which of the following is heterozygous genotype?

• Tt

• tt

• TT

Identify as Homozygous or heterozygous? JJ

• Homozygous

• Heterozygous

An orange-flowered plant is crossed with a purple-flowered plant. If orange is the dominant trait and purple is the recessive trait, what percentage of the offspring have a chance of being an Orange flower ?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3