What is the difference between multiple alleles and polygenic traits?

Advances in technology have enabled scientists and researchers to better study the evolutionary relationships between species

Modern whales developed their traits through natural selection what occurs during the process of natural selection

Suppose you have monohybrid pea plants in your garden and find that they produce round seed to wrinkled seeds in the ratio of 3: 1. if the allele are designated (r & r) receptively. what is the probable genotypes of the round seeds which produced f 1 ? rr & rr rr only rr & rr rr only rr only