Answer to Question #181478 in Genetics for John

Question

1. 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)

2. Identify the mixed up stages of meiosis, shown in appendix A. Write a breif sentence to justify the stage identified. Complete this all within the appendix table and place within your assignment.

Indicate clearly where the opportunities arise in meiosis for genetic variation and outline and illustrate briefly how this happens.

Answer 1

1.Chromosome: A carrier of genetic information that is visible under an ordinary light microscope

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

A gene is the basic physical and functional unit of heredity. Genes are made up of DNA.

An allele is a variant form of a gene.

Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. ... A gamete will end up with 23 chromosomes after meiosis, but independent assortment means that each gamete will have 1 of many different combinations of chromosomes.