Exam 6: Chromosome Mutations: Variation in Number and Arrangement

Describe the maternal age effect associated with Down syndrome.

Deletions are chromosomal aberrations in which some portion of a chromosome is missing.Describe a method using Drosophila deletions to determine the actual,physical location of a gene.

The term aneuploidy is synonymous with the term segmental deletion.

An autotriploid may arise when three sperm cells are involved in fertilization of a single egg.

Individuals with familial Down syndrome are trisomic and have 47 chromosomes.

In what way might gene duplication play a role in evolution?

Name the polyploid condition that is formed from the addition of one or more extra sets of chromosomes identical to the normal haploid complement of the same species.

Provide an example of gene redundancy that occurs in both eukaryotes and prokaryotes.