Punnett Squares Practice

 In cacti, long arms (A) are dominant to short arms (a).  Suppose 2 heterozygous cacti are crossed.  What percentage of their offspring are expected to have short arms?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

 Aa, DD, bB, yy are all examples of

• Genotypes

• Phenotypes

• Chromosomes

• Dihybrid crosses

Which of the following is a phenotype?

• Aa

• Heterozygous

• DNA

• Red Hair

What are the possible genotypes for this cross?

• TT = 25%

  Tt= 50%

  tt=25%

• TT = 75%

  Tt= 25%

• Tt= 50%

  tt=50%

• All tall

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If green (G) is dominant over purple (g), then what is the genotype for this individual?

Evaluate responses using AI:

OFF

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the physical characteristics that results from the expression of genes?

Tags

NGSS.HS-LS3-1

 

In guinea pigs, the allele for short hair is dominant. If all the guinea pigs are born short haired what are the possible genotypes of the parents? (There are two possible combinations.)

• Ss+Ss

• SS+SS

• SS+ss

• SS+Ss

Tags

NGSS.HS-LS3-1

What are the possible phenotype(s) of the offspring? (A-Brown hair; a-blond hair)

• 50 % Brown Hair and 50% Blond Hair

• 25 % Brown Hair and 75% Blond Hair

• 75 % Brown Hair and 25% Blond Hair

• 0% Brown Hair and 100% Blond Hair

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-3

What genotype would go in box 2?

And is it Homozygous or Heterozygous?

• BB Heterozygous

• Bb Heterozygous

• bb Homozygous

• Bb Homozygous

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In watermelons, green rinds (G) are dominant to striped rinds (g).  What is the genotype of a heterozygous green watermelon?

• GG

• Gg

• gg

• Green

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2