Genes, Chromosomes and DNA

Question 1

Describe the nucleus. (Where?, what has one? etc.)

Answer 1

Most cells in your body have one

The nucleus contains your genetic material in the form of chromosomes

Question 2

How many chromosomes are in a HUMAN nucleus?

Answer 2

23 PAIRS of chromosomes

Question 3

Describe chromosomes and genes. (Where?, what has one? etc.)

Answer 3

Chromosomes carry genes
Different genes control the development of different characteristics
A gene is a short length of the chromosome
A gene is a long length of DNA

Question 4

Describe DNA. (Where?, what has one? etc.)

Answer 4

A gene is a long length of DNA

The DNA is coiled up to form the arms of the chromosome

Question 5

What is an allele?

Answer 5

There can be different versions of the same gene, which give different versions of a characteristic (like blue or brown eyes). The different versions of the same gene are alleles .