What types of cells don't go through the process of chromatids

What is the compliment dna strand to the following sequence: ttgactaggcta

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna

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