Question

which represents the cross between parent plants if one is heterozygous and has yellow - colored pods and the other is homozygous and has green - colored pods?
○ yy yy
○ yy yy
○ yy yy
○ yy yy

Explanation:

Step1: Recall Genotype Definitions

Heterozygous means two different alleles (e.g., \( Yy \)), homozygous means two identical alleles (e.g., \( yy \) for recessive, \( YY \) for dominant). Yellow pods (assuming yellow is dominant or heterozygous shows yellow) – heterozygous parent: \( Yy \). Green pods (homozygous, so if green is recessive, genotype \( yy \)).

Step2: Analyze Each Option

• Option 1: \( Yy \times yy \) – matches heterozygous (\( Yy \)) and homozygous green (\( yy \)).
• Option 2: \( YY \times yy \) – \( YY \) is homozygous dominant, not heterozygous. Eliminate.
• Option 3: \( Yy \times Yy \) – both heterozygous, not matching one homozygous. Eliminate.
• Option 4: \( yy \times yy \) – both homozygous, not matching one heterozygous. Eliminate.

Answer:

Yy × yy (the first option: Yy ' yy)