Punnett Squares

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

• recessive

• dominant

• both

Which of the following alleles is purebred recessive?

• Tt

• tt

• TT

Aa, DD, Ba, and yy are all examples of ---

• genotypes

• phenotypes

Which of the following genotypes is homozygous dominant?

• aa

• Aa

• AA

Which of the following genotypes is heterozygous?

• Bb

• BB

• bb

Why do scientist use Punnett Squares?

• A tool scientist use to to see alleles

• A tool scientist use to see which alleles are dominant

• A tool scientist use to determine possible genotypes for offspring

Fill in the Yellow Box

• AA

• Aa

• aa

Fill in the Yellow Box

• Bb

• BB

• bb

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%

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