Question

when considering flower color, p = purple and p = white. in mendels monohybrid cross of a homozygous recessive parent pea plant and a homozygous dominant parent pea plant, consider the first set of offspring (the f1 generation) when completing a punnett square, which of the following would describe the correct phenotype of the offspring? (6kcs 7e)
a. showed the phenotypes of purple and white flowers.
b. showed purple and white striped flowers.
c. showed only purple flowers.
d. showed only white flowers.

Explanation:

The problem is about Mendelian genetics, specifically a monohybrid cross. The parents are a homozygous recessive (pp, white) and a homozygous dominant (PP, purple) pea plant. When crossing PP (purple) and pp (white), the F1 generation will have the genotype Pp. Since purple (P) is dominant over white (p), the phenotype of all F1 offspring will be purple. So we analyze each option:

• Option A: Says phenotypes of purple and white. But F1 should all be purple, so A is wrong.
• Option B: Says purple and white striped. There's no striped phenotype here, so B is wrong.
• Option C: Says only purple flowers. This matches the F1 generation (Pp, dominant purple is expressed), so C is correct.
• Option D: Says only white flowers. But dominant allele is present, so D is wrong.

Answer:

C. Showed only purple flowers.