4.1.2.1 Chromosomes Flashcards
1
Q
What is genetic material in the form of?
A
- chromosomes
2
Q
What are chromosomes like in the nucleus?
A
- coiled up lengths of DNA molecules
3
Q
What does each chromosome carry?
A
- a large number of genes
4
Q
What is a gene?
A
- a short section of DNA that codes for a protein
- controls characteristics
5
Q
What do body cells normally have two copies of?
A
- each chromosome
- one from the organism’s ‘mother’ and one from the ‘father’
6
Q
How many chromosomes are in a human cell?
A
- 23 pairs
- 46 overall
7
Q
How many chromosomes are in a gamete?
A
- 23 chromosomes total in each cell
