DNA and Punnett Squares

Trait of an organism that can be HIDDEN by the dominant form of a trait.

• Recessive Trait

• Phenotype

• Allele

What does the prefix hetero- in heterozygous mean?

• same

• different

• dating

• human

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

• recessive

• dominant

• both

tt

• Dominant 

• Recessive

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In the punnett square shown, what must the genotype of the missing parent be?

• BB

• Bb

• bb

• Tt

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following is homozygous dominant?

• Yy

• Y

• yy

• YY

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 a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being purple?

• 25%

• 0%

• 100%

• 50%

Tags

NGSS.HS-LS3-1

B = brown fur  b = white fur
In the punnett square, what is the probability for white fur? 

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Recessive alleles are represented by a:

• Male gene

• lowercase letter

• dominant trait

• capital letter