Punnett Squares Level 2

A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?

• 0%

• 25%

• 50%

• 75%

A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?

• 0%

• 25%

• 50%

• 75%

What is the probability of a purple-horned unicorn if a heterozygous pink-horned unicorn is crossed with a heterozygous pink-horned unicorn?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.MS-LS3-2

Georgette wants to breed her pet phoenixes, but she isn't sure if the babies will burst into blue flames or red flames. Her documents show that her female phoenix is homozygous dominant for red flames, while her male phoenix is homozygous recessive for blue flames. What color flames will the babies have?

• Red
• Blue
• Purple
• 50% Red, 50% Blue

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Leonardo bet his friend Olivet that two heterozygous green-eyed sea monsters could not have a recessive blue-eyed baby sea monster. Olivet said they can have a blue-eyed sea monster.
Who wins the bet?

• Leonardo
• Olivet
• Both
• Neither

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Bob the abominable snowman lives in the snowy Andes mountains. He has white fur, which blends in nicely. He is therefore dismayed when his mate keeps having red-furred babies. What is Bob's likely genotype?

• Homozygous Dominant
• Heterozygous
• Homozygous Recessive

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What phenotype would result from crossing a homozygous dominant purple-flowered pea plant with a homozygous recessive white-flowered pea plant?

• Pp
• Purple
• White
• PP and pp

Tags

NGSS.MS-LS3-2

If you cross two heterozygous traits (Rr x Rr), as Mendel did in his second experiment, what ratio will you get between offspring with the dominant and recessive phenotypes

• 1:1

• 2:1

• 3:1

• 4:1

A trait that is NOT expressed when a dominant allele is present.

• Recessive

• Co-dominant

• Incomplete Dominant

• Dominant

A trait that is expressed over other traits.

• Recessive
• Co-dominant
• Incomplete Dominant
• Dominant