Amoeba Sisters: Punnett Squares

What does a recessive allele require to be expressed in the phenotype?

• At least one dominant allele

• No dominant alleles present

• Two recessive alleles from one parent

• Two dominant alleles

What genotype represents a hairless guinea pig?

• HH

• Hh

• HHh

• hh

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the genotype of a guinea pig that has hair?

• hh

• hhh

• HH or Hh

• HHH

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What does 'homozygous' mean?

• One dominant and one recessive allele

• Different alleles

• Same alleles

• Alleles are from different parents

What is the phenotype ratio from crossing two heterozygous guinea pigs?

• 2 hairless: 2 have hair

• All are hairless

• 1 hairless: 3 have hair

• All have hair

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What is the purpose of a Punnett square in genetics?

• To calculate the height of organisms

• To determine the exact traits of offspring

• To predict the weather

• To predict the possible genotypes of offspring

What does a genotype of 'Hh' represent?

• Hairless

• Homozygous dominant

• Heterozygous

• Homozygous recessive

What percentage of offspring will have hair when two heterozygous guinea pigs are crossed?

• 100%

• 75%

• 50%

• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Why can't you determine the exact genotype of a guinea pig with hair by just looking at it?

• Because it could be HH or Hh

• Because it could be hairless

• Because the hair color affects the genotype

• Because it is always hh

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What does 'phenotype' refer to?

• The dominance of alleles in genetics

• The probability of an organism having offspring

• The physical traits of an organism

• The genetic makeup of an organism