Question

second generation experiment self - pollination of f₁ generation plants - three - quarters were box - one - quarter were box fill in the blanks to complete the diagram. p₁ box pea plant box pea plant ↓ f₁ all box pea plants ↓ f₂ box tall box short

Explanation:

Step1: Identify P₁ generation traits

The P₁ generation shows one short and one tall pea plant, so fill:
Left box: Short
Right box: Tall

Step2: Identify F₁ generation trait

All F₁ offspring from true-breeding P₁ are tall, so fill:
Box under F₁: Tall

Step3: Fill F₂ generation ratios

From monohybrid cross, 3/4 are tall, 1/4 are short, so fill:
First box (tall): $\frac{3}{4}$
Second box (short): $\frac{1}{4}$

Step4: Fill top trait boxes

Self-pollinating F₁ (tall) gives 3/4 tall, 1/4 short, so fill:
Top first box: Tall
Top second box: Short

Answer:

1. P₁ left box: Short
2. P₁ right box: Tall
3. F₁ box: Tall
4. F₂ tall box: $\frac{3}{4}$
5. F₂ short box: $\frac{1}{4}$
6. Top first box: Tall
7. Top second box: Short