Y9-Key Structure (Cell Diagram) Flashcards
1
Q
Define Cell
A
A cell is the smallest unit of life. Cells are often called the “building blocks of life”.
2
Q
Define Nucleus
A
it contains the cell’s genetic material. This material is organised as DNA molecules.
3
Q
Define Chromosomes
A
A chromosome is a structure in the nucleus that consists of DNA
Females have two X chromosomes
Males have an X chromosome and a Y chromosome
4
Q
Define genes
A
Within a chromosome is hundreds of genes
A gene is a length of DNA that codes for 1 characteristic (phenotype)
Within a gene are hundreds of DNA
5
Q
Define DNA
A
It is genetic instruction which makes up our characteristics and features of an organism.
6
Q
What is the structure of a Gene/DNA?
A
Double Helix
