Punnett Square Practice Spring Case

Two heterozgyous tall pea plants are crossed. What is the expected phenotypic outcome for the offspring?

• 100% tall

• 50% tall, 50% short

• 75% tall, 25% short

• 100% short

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

• 0 %
• 25%
• 50%
• 75%

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%

What phenotype would result from crossing a homozygous dominant purple-flowered pea plant with a homozygous recessive white-flowered pea plant?

• Pp
• Purple
• White
• PP and pp

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

• 0%
• 25%
• 50%
• 75%

When 2 pea plants heterozygous for height (Tt) are crossed, what is the ratio of the resulting genotypes (TT:Tt:tt)?

• 1:2:1
• 2:1:1
• 0:3:1
• 0:2:2

A green pea plant (GG) is being crossed with a green pea plant (Gg). What is the phenotype?

• 100 % rainbow 
• 50% yellow and 50% green 
• 100% green
• 100% yellow 

A tall plant (TT) is crossed with a tall plant (Tt).  What is the genotype?

• 2 TT: 2 Tt: 0 tt
• 1 TT: 2 Tt: 1 tt
• 2 TT: 1 Tt: 1 tt
• 0 TT: 0 Tt: 4 tt

A homozygous dominant brown mouse is crossed with a heterozygous brown mouse (tan is the recessive color). 

• 100 % tan
• 100 % brown 
• 50 % brown and 50% tan 
• 75 % brown and 25 % tan 

In sheep, short ears (L) are dominant over long ears (l). A sheep with short ears (Ll) is crossed with a sheep with long ears (ll). What is the chance of an offspring having long ears?

• 25%
• 50%
• 75%
• 100%