Genetics
IB Biology Genetics
IB Biology Genetics
Kartei Details
| Karten | 50 |
|---|---|
| Sprache | English |
| Kategorie | Biologie |
| Stufe | Andere |
| Erstellt / Aktualisiert | 11.03.2013 / 18.05.2018 |
| Lizenzierung | Kein Urheberrechtsschutz (CC0) |
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What are eukaryote chromosomes made of?
DNA and Proteins
What are the chromosome facts?
1. The number of chromosomes per species is fixed
2. The shape of a chromosome is characteristic
3. The chromosomes of a cell occur in homologous pairs
4. Chromosomes hold the hereditary factors - genes
5. Chromosomes copy themselves
What is a gene?
A heritable factor that controls a specific characteristic
What is an allele?
One specific form of a gene, differing from other alleles by one or a few bases only and occupying the same gene locus as other alleles of the gene
What is a genome?
The whole of the genetic information of an organism
What is a homologous chromosome?
Chromosomes that occur in diploid cells, comtaining the same sequence of genes, but have come from different parents
What is a sister chromatid?
During interphase the DNA is replicated so a chromosome will have two identical sister chromatids when it enters cell division
How do mutations occur, and how can the chance of occurrence be increased?
Mutations occur randomly, but the chance of occurrance can be increased by mutagens e.g. radiation, uv light and poisons
