Amoeba Sisters Punnett Squares

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

• No dominant alleles present

• Two dominant alleles

• At least one dominant allele

• A heterozygous genotype

What genotype represents a hairless guinea pig?

• hh

• Hh

• HH

• HHh

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

• hhh

• hh

• HHH

• HH or Hh

What does 'homozygous' mean?

• Different alleles

• A single allele

• Same alleles

• Dominant alleles only

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

• 1 hairless: 3 with hair

• 2 hairless: 2 with hair

• All hairless

• All with hair

What is the purpose of a Punnett square in genetics?

• To predict the possible genotypes of offspring

• To calculate the height of organisms

• To determine the exact traits of offspring

• To predict the weather

What does a genotype of 'Hh' indicate?

• Homozygous recessive

• Heterozygous

• Homozygous dominant

• Hairless

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

• 75%

• 50%

• 100%

• 25%

What does the presence of a dominant allele ('H') in a guinea pig's genotype signify?

• The guinea pig will have hair

• The guinea pig will be hairless

• The guinea pig will be heterozygous

• The guinea pig's genotype is hh

Why are Punnett squares considered predictions?

• They provide exact outcomes

• They are based on probabilities

• They only work for guinea pigs

• They show past genetic crosses