Genetics Analysis & Principles Chapter 10

Flashcards covering key concepts from Chapter 10 of Genetics Analysis & Principles related to chromosome transmission, structure, and function.

Chromosomes

Structures that contain the genetic material, consisting of DNA and proteins.

Genome

The complete set of genetic material in an organism.

Eukaryotes

Organisms with complex cells containing a nucleus and organelles, including animals, plants, and fungi.

Nucleoid

The region within a bacterial cell where the chromosomal DNA is located, not bounded by a membrane.

Negative Supercoiling

A form of DNA supercoiling that aids in chromosome compaction and can create tension promoting strand separation.

DNA Gyrase

An enzyme that introduces negative supercoils into DNA using energy from ATP.

Nucleosome

The repeating structural unit of eukaryotic chromatin, consisting of a segment of DNA wrapped around a histone octamer.

Euchromatin

Less condensed regions of chromosomes that are generally transcriptionally active.

Heterochromatin

Tightly packed regions of chromosomes that are generally transcriptionally inactive.

Condensin

A multiprotein complex that plays a critical role in chromosome condensation during cell division.

Cohesin

A multiprotein complex that helps in the alignment and cohesion of sister chromatids during cell division.

Radial Loop Domains

A compaction mechanism of DNA involving the attachment of loops of DNA to a nuclear matrix.

Intergenic Regions

Nontranscribed DNA sequences located between adjacent genes.

Telomeres

Specialized regions at the ends of linear chromosomes that protect DNA from degradation.

Origins of Replication

Sites within the DNA where DNA replication begins.