A Pea plant that is homozygous for inflated pods are heterozygous for round seeds is crossed with a plant that is heterozygous for inflated pods and a homozygous for wrinkled seeds this across would produce a 4:12 or 1:3 phenotypic ratio true or false

The answer is False!

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. A Pea plant that is homozygous for inflated pods are heterozygous for round seeds: PPSs

2. A 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

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

So, the phenotypic ratio is not 1 : 3