Genetics Squares Practice

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

• recessive

• dominant

• both

T - tall and t = short

In the Punnett square, what belongs in the missing square?

• tt

• Tt

• TT

B = brown fur b = white fur

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

• 0%

• 25%

• 50%

• 75%

Each one of the boxes on the Punnett square represents what probability of an offspring's genotype?

• 25%

• 1%

• 10%

• 0%

What is ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness? T = tall t = short

• 0 in 4

• 1 in 4

• 2 in 4

• 4 in 4

Fill in the Yellow Box

• Bb

• BB

• bb

Fill in the Yellow Box

• AA

• Aa

• aa

The punnett square is used to tell the color of a frogs skin. "G" means green skin and "g" means brown skin. What is the chance the baby frogs will have brown skin?

• 0%

• 25%

• 50%

• 100%

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%

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