Question

a tall pea plant (tt) is crossbred with another tall pea plant (tt). the punnett square below shows the separated alleles for two pea plants.

which of the following shows the correct match of the box numbers and the genotype of the offspring?

1 = tt; 2 = tt; 3 = tt; 4 = tt
1 = tt; 2 = tt; 3 = tt; 4 = tt
1 = tt; 2 = tt; 3 = tt; 4 = tt
1 = tt; 2 = tt; 3 = tt; 4 = tt

Explanation:

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<reasoning>

Identify parent alleles

The female parent has genotype \(Tt\), meaning her gametes carry alleles \(T\) and \(t\). These are placed at the top of the columns: column 1 corresponds to allele \(T\), and column 2 corresponds to allele \(t\).
The male parent has genotype \(Tt\), meaning his gametes carry alleles \(T\) and \(t\). These are placed at the left of the rows: row 1 (boxes 1 and 2) corresponds to allele \(T\), and row 2 (boxes 3 and 4) corresponds to allele \(t\).

Determine offspring genotypes

Combine the column allele and row allele for each box:

• Box 1: Column \(T\) and Row \(T\) combine to form genotype \(TT\).
• Box 2: Column \(t\) and Row \(T\) combine to form genotype \(Tt\).
• Box 3: Column \(T\) and Row \(t\) combine to form genotype \(Tt\).
• Box 4: Column \(t\) and Row \(t\) combine to form genotype \(tt\).

Match with options

The correct combination is:
\(1 = TT\); \(2 = Tt\); \(3 = Tt\); \(4 = tt\).
This matches the third option.
</reasoning>

<answer>
<mcq-option>(A) \(1 = Tt\); \(2 = tt\); \(3 = Tt\); \(4 = tt\)</mcq-option>
<mcq-option>(B) \(1 = Tt\); \(2 = Tt\); \(3 = Tt\); \(4 = Tt\)</mcq-option>
<mcq-correct>(C) \(1 = TT\); \(2 = Tt\); \(3 = Tt\); \(4 = tt\)</mcq-correct>
<mcq-option>(D) \(1 = TT\); \(2 = TT\); \(3 = Tt\); \(4 = tt\)</mcq-option>
</answer>

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Answer:

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<reasoning>

Identify parent alleles

The female parent has genotype \(Tt\), meaning her gametes carry alleles \(T\) and \(t\). These are placed at the top of the columns: column 1 corresponds to allele \(T\), and column 2 corresponds to allele \(t\).
The male parent has genotype \(Tt\), meaning his gametes carry alleles \(T\) and \(t\). These are placed at the left of the rows: row 1 (boxes 1 and 2) corresponds to allele \(T\), and row 2 (boxes 3 and 4) corresponds to allele \(t\).

Determine offspring genotypes

Combine the column allele and row allele for each box:

• Box 1: Column \(T\) and Row \(T\) combine to form genotype \(TT\).
• Box 2: Column \(t\) and Row \(T\) combine to form genotype \(Tt\).
• Box 3: Column \(T\) and Row \(t\) combine to form genotype \(Tt\).
• Box 4: Column \(t\) and Row \(t\) combine to form genotype \(tt\).

Match with options

The correct combination is:
\(1 = TT\); \(2 = Tt\); \(3 = Tt\); \(4 = tt\).
This matches the third option.
</reasoning>

<answer>
<mcq-option>(A) \(1 = Tt\); \(2 = tt\); \(3 = Tt\); \(4 = tt\)</mcq-option>
<mcq-option>(B) \(1 = Tt\); \(2 = Tt\); \(3 = Tt\); \(4 = Tt\)</mcq-option>
<mcq-correct>(C) \(1 = TT\); \(2 = Tt\); \(3 = Tt\); \(4 = tt\)</mcq-correct>
<mcq-option>(D) \(1 = TT\); \(2 = TT\); \(3 = Tt\); \(4 = tt\)</mcq-option>
</answer>

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