Punnett Square

Which Punnett square represents the cross of two heterozygous red flowering plants?

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• 
• 
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Tags

NGSS.HS-LS3-2

In spiders, a hairy body (H) is dominant to a bald body (h). Two spiders that are heterozygous for body type are crossed. Which genotypes are produced in the offspring?

• HH, Hh, and hh

• HH and Hh

• Hh and hh

• Hh only

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Aspen trees can have round leaves (R) or oval leaves (r). What are the phenotypes of the offspring if the parents are homozygous dominant?

• 75% round, 25% oval

• 25% round, 75% oval

• 100% round

• 100% oval

Tags

NGSS.HS-LS3-1

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

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

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

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 white?

• 25%

• 0%

• 100%

• 50%

Tags

NGSS.HS-LS3-3

What is the phenotype of the offspring? (A-Brown hair; a-blonde hair)

• 50 % Brown Hair and 50% Blonde Hair 

• 25 % Brown Hair and 75% Blonde Hair 

• 75 % Brown Hair and 25% Blonde Hair 

• 0% Brown Hair and 100% Blonde Hair 

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What is the yellow seed genotype?

• aa

• Aa

• AA

• AA or Aa

Tags

NGSS.HS-LS3-2

Aa is an example of

• homozygous dominant

• homozygous recessive

• heterozygous

• none of these