In a monohybrid cross between two heterozygous individuals (Aa), what is the expected genotypic ratio?

• 1:2:1

• 3:1

• 9:3:3:1

• 1:1

In a monohybrid cross between two heterozygous individuals (Aa), what is the expected phenotypic ratio?

• 1:2:1

• 3:1

• 9:3:3:1

• 1:1

If a homozygous dominant individual (AA) is crossed with a homozygous recessive individual (aa), what will be the genotype of the offspring?

• AA

• Aa

• aa

• A mix of AA and aa

What is the probability of obtaining a homozygous recessive offspring (aa) from a monohybrid cross between two heterozygous parents (Aa)?

• 1

In a monohybrid cross between two heterozygous pea plants (Tt), what is the probability of getting a plant with tall stems (assuming tall is dominant)?

• 25%

• 50%

• 75%

• 100%

If a homozygous dominant plant (AA) is crossed with a homozygous recessive plant (aa), what will be the genotype of the F1 generation?

• AA

• Aa

• aa

• Aa and aa

Analyze the following scenario: In a population of flowers, red color (R) is dominant over white (r). If two heterozygous red flowers are crossed, what is the probability of producing a white flower?

• 0

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DOK Level 3: Strategic Thinking

Select the boxes in the Punnett Square where you would find heterozygous offspring.

According to this Punnett square ​ (a)   Of the offspring will be homozygous dominant, ​ (b)   Of the offspring will be heterozygous, and the remaining 25% will homozygous ​ (c)   . As for the phenotypes, ​ (d)   Of the flowers will be ​ (e)   .

• 25%
• 50%
• recessive
• 75%
• pink
• 100%
• White

The probability of the offspring having short tusks when a heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant is (a)   .

• 0%
• 25%
• 50%
• 75%

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3