Question

purple petal color in pea plants is dominant to white petal color. two heterozygous pea plants are crossed. determine the genotype of the offspring. 1 2 3 4 d d d 1 2 d 3 4

Explanation:

Step1: Analyze Parent Genotypes

Both parents are heterozygous, so their genotype is \( Dd \). Each parent can contribute either \( D \) or \( d \) allele.

Step2: Determine Offspring Genotypes (Punnett Square)

• Cell 1 (Top - Left): Parent 1 contributes \( D \), Parent 2 contributes \( D \). Genotype: \( DD \)
• Cell 2 (Top - Right): Parent 1 contributes \( D \), Parent 2 contributes \( d \). Genotype: \( Dd \)
• Cell 3 (Bottom - Left): Parent 1 contributes \( d \), Parent 2 contributes \( D \). Genotype: \( Dd \)
• Cell 4 (Bottom - Right): Parent 1 contributes \( d \), Parent 2 contributes \( d \). Genotype: \( dd \)

Answer:

1. \( DD \)
2. \( Dd \)
3. \( Dd \)
4. \( dd \)