Question

the table below shows some dominant and recessive traits in pea plants.

dominant and recessive traits for pea plants

trait
pod color
seed texture
dominant phenotype and allele
green pods (g)
smooth seeds (s)
recessive phenotype and allele
yellow pods (g)
wrinkled seeds (s)
to produce offspring with 100% yellow pods and wrinkled seeds, what parental genotypes must a researcher use?

○ ggss × ggss
○ ggss × ggss
○ ggss × ggss
○ ggss × ggss

Explanation:

Step1: Analyze pod color trait

For yellow pods (recessive, \( gg \)), to get 100% yellow pods (\( gg \)), both parents must contribute \( g \) allele. So parents for pod color must be \( gg\times gg \). Because if any parent had \( G \) (dominant green pod allele), there would be a chance of green pods in offspring.

Step2: Analyze seed texture trait

For wrinkled seeds (recessive, \( ss \)), to get 100% wrinkled seeds (\( ss \)), both parents must contribute \( s \) allele. So parents for seed texture must be \( ss\times ss \). If any parent had \( S \) (dominant smooth - seed allele), there would be a chance of smooth seeds in offspring.

Combining both traits, the parental genotypes must be \( ggss\times ggss \)

Answer:

\( ggss\times ggss \) (the first option in the given choices, assuming the options are ordered as \( ggss\times ggss \), \( SsSs\times GgSs \), \( GgSS\times Ggss \), \( GgSs\times GgSs \))