What are the three roles of DNA

In pea plants, the allele for inflated pod seed, i, is dominant over the allele for constricted pod seed, i. the punnett square shows a cross for this trait. which offspring will be homozygous dominant

28. how many linkage groups will be formed by homogametic organism with 28 chromosomes?

Can a trait be both polygenic and have multiple alleles? explain why or why not.