Answer to Question #177033 in Genetics for John

Question

Explain the terms Chromosome, Chromatid, Gene, Allele.

(Use genetic notation (symbols for alleles) and annotated diagrams to illustrate your response. Show links between the terms)

Answer 1

A chromosome is a long DNA molecule with part or all of the genetic material of an organism.

A chromatid is one of two identical halves of a replicated chromosome.

A gene is the basic physical and functional unit of heredity.

An allele is a variant form of a gene.