Punnett Square Practice

In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?

• Tall = T
  Short = S
• Tall = T
  Short = t
• Tall = t
  Short = T
• Tall = TT
  Short = tt

Tags

NGSS.HS-LS3-1

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-LS3-3

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%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

NGSS.HS-LS4-3

A Jawa notices that his beloved pet desert rat, who has brown fur, just had several rat babies, some of which had white fur and some which had brown fur. Brown fur is the dominant trait. This means his rat must have what genotype?

• Homozygous Dominant
• Heterozygous
• Homozygous Recessive

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Identify the homozygous dominant genotype:

• FF
• Ff
• ff

T - tall and t = short
In the punnett square below, what belongs in the missing square

• tt
• Tt
• Bb
• TT

Tags

NGSS.HS-LS3-1

In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-3

A brown cat (BB) has a litter of kittens with a white cat (bb). What percent of their kittens will be brown?

• 10%

• 25%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

What genotype would be in the box with the question mark?

• Aa

• AA

• aa

• AB

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Mom is heterozygous and has brown eyes. Dad is homozygous recessive for blue eyes. What percent of their children will have blue eyes?

• 100%

• 25%

• 50%

• 75%