Question

in pea plants, yellow seed color is dominant and green seed color is recessive. what will the generations look like? assume that mendel’s method of crossing two true breeding parents with opposite traits is followed. check all that apply. the p generation has all yellow seeds. the p generation has all green seeds. the p generation has yellow and green seeds. the f₁ generation has yellow and green seeds. the f₁ generation has all yellow seeds. the f₂ generation has all green seeds. the f₂ generation has yellow and green seeds. done

Explanation:

1. P generation: True - breeding parents with opposite traits (yellow and green seeds) mean one parent has all yellow (homozygous dominant, e.g., YY) and the other all green (homozygous recessive, e.g., yy). So the P generation has yellow and green seeds (one parent yellow, one green).
2. F₁ generation: When crossing YY (yellow) and yy (green), all offspring (F₁) will be Yy (heterozygous). Since yellow (Y) is dominant, all F₁ seeds are yellow.
3. F₂ generation: When F₁ (Yy) self - cross (Yy × Yy), the Punnett square gives genotypes YY, Yy, Yy, yy. Phenotypically, YY and Yy are yellow, yy is green. So F₂ has both yellow and green seeds.

Answer:

• The P generation has yellow and green seeds.
• The F₁ generation has all yellow seeds.
• The F₂ generation has yellow and green seeds.