Topic 4 - Genes Flashcards
What’s the role of histones?
To organise and condense the DNA tightly so that it fits into the nucleus
What’s a chromatin?
The tightly coiled combination of DNA and proteins, that makes up the chromatids
What are sister chromatids?
The two chromatids that make up the double structure of the chromosome
Why is it important that the sister chromatids are identical?
During cell division, one chromatid goes into one daughter cell and one goes to the other daughter cell during mitosis, ensuring that the daughter cells are genetically identical.
What is the definition of a gene?
It’s a base sequence of DNA that codes for the amino acid sequence of a polypeptide chain and for a functional RNA.
What’s is the definition of locus?
The position of the gene on a chromosome
