Chromosomes Flashcards
1
Q
What do Chromosomes normally come in?
A
Pairs
2
Q
What similarities do chromosomes in a pair have?
A
The same sequence (i.e. the same genes in the same place)
3
Q
Do all species have the same number of pairs?
A
No; different species have different number of pairs
4
Q
How many pairs do human cells contain?
A
23 pairs (46 in total)
5
Q
What cells contain single chromosomes?
A
Sex Cells
A Sperm & an Egg both carry 23 individual chromosomes and during fertilisation the fertilised egg cell then has 46 chromosomes (23 pairs) half from the mother and the other half from the father.
6
Q
What is a chromosome?
A
A thread-like structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
