Question

question 3(multiple choice worth 4 points)
(06.03 mc)

a pea plant with round seeds (rr) is crossbred with another pea plant with wrinkled seeds (rr). what is the probability of the offspring having wrinkled seeds?

0%
25%
50%
75%

Explanation:

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"concepts_used": [
"Punnett Square",
"Monohybrid Cross",
"Genotype Determination"
],
"new_concepts": [],
"current_concepts": [
"Punnett Square",
"Monohybrid Cross",
"Genotype Determination"
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</pre_analysis>

<reasoning>

Identify parental genotypes

Using the Monohybrid Cross and Genotype Determination knowledge points

• Parent 1: \(RR\) (homozygous dominant, round seeds)
• Parent 2: \(rr\) (homozygous recessive, wrinkled seeds)

Set up the cross

Using the Punnett Square knowledge point

• Parent 1 gametes: \(R\), \(R\)
• Parent 2 gametes: \(r\), \(r\)
• All offspring genotypes: \(Rr\) (heterozygous)

Determine offspring phenotypes

Using the Genotype Determination knowledge point

• Genotype \(Rr\) results in round seeds because the dominant allele \(R\) masks the recessive allele \(r\).
• Probability of wrinkled seeds (\(rr\)): \(0\%\)

</reasoning>

<answer>
<mcq-correct>(A) 0%</mcq-correct>
<mcq-option>(B) 25%</mcq-option>
<mcq-option>(C) 50%</mcq-option>
<mcq-option>(D) 75%</mcq-option>
</answer>

<post_analysis>
{
"subject": "Natural Science",
"question_type": "Multiple Choice",
"knowledge_point": [
"Natural Science",
"Biology",
"Mendelian Genetics"
]
}
</post_analysis>

Answer:

<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"multiple_choice_formatter",
"explain_then_answer",
"tutor",
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],
"needs_drawing": false,
"concepts_used": [
"Punnett Square",
"Monohybrid Cross",
"Genotype Determination"
],
"new_concepts": [],
"current_concepts": [
"Punnett Square",
"Monohybrid Cross",
"Genotype Determination"
]
}
</pre_analysis>

<reasoning>

Identify parental genotypes

Using the Monohybrid Cross and Genotype Determination knowledge points

• Parent 1: \(RR\) (homozygous dominant, round seeds)
• Parent 2: \(rr\) (homozygous recessive, wrinkled seeds)

Set up the cross

Using the Punnett Square knowledge point

• Parent 1 gametes: \(R\), \(R\)
• Parent 2 gametes: \(r\), \(r\)
• All offspring genotypes: \(Rr\) (heterozygous)

Determine offspring phenotypes

Using the Genotype Determination knowledge point

• Genotype \(Rr\) results in round seeds because the dominant allele \(R\) masks the recessive allele \(r\).
• Probability of wrinkled seeds (\(rr\)): \(0\%\)

</reasoning>

<answer>
<mcq-correct>(A) 0%</mcq-correct>
<mcq-option>(B) 25%</mcq-option>
<mcq-option>(C) 50%</mcq-option>
<mcq-option>(D) 75%</mcq-option>
</answer>

<post_analysis>
{
"subject": "Natural Science",
"question_type": "Multiple Choice",
"knowledge_point": [
"Natural Science",
"Biology",
"Mendelian Genetics"
]
}
</post_analysis>