P - dominant allele for inflated pods p - recessive allele for inflated pods PP - homozygote with inflated pods Pp - heterozygote with inflated pods pp - homozygote with inflated pods
S - dominant allele for round seeds s - recessive allele for wrinkled seeds SS - homozygote with round seeds Ss - heterozygote with round seeds ss - homozygote with wrinkled seeds
1. <span>A Pea plant that is homozygous for inflated pods are heterozygous for round seeds: PPSs 2. A</span><span> plant that is heterozygous for inflated pods and a homozygous for wrinkled seeds: Ppss
Let's look at their genotypes separately, and cross them that way:
Parents: PP x Pp Offspring: PP PP Pp Pp All of the offspring will have the same phenotype (100% = 1). So, this trait does not affect phenotypic ratio
</span>Parents: Ss x ss Offspring: Ss Ss ss ss Half of the offspring will have wrinkled seeds and half of them will have round seeds: 50% : 50% = 1 : 1
