B1 Genes

HideShow resource information
  • Created by: Tami
  • Created on: 28-03-16 22:00
What are Genes?
Genes carry instructions that control how you develop and function. They do this by telling the cells to make proteins needed for your body to work.
1 of 18
Where are genes found in a cell?
The nucleus
2 of 18
A gene is a section of what?
DNA (A gene is a section of a very long molecule of a chemical called DNA or deoxyribonucleic acid)
3 of 18
Lengthe of DNA are packed into structures called?
chromosomes
4 of 18
How many genes are there approximately on our chromosomes?
between 20,000 and 25,000
5 of 18
Strands of DNA are made of four chemicals called?
bases
6 of 18
Name the two groups of proteins?
functional proteins and structural proteins
7 of 18
What do functional proteins do?
They enable the body to function. E.G enzymes, antibodies and hormones
8 of 18
What do structural proteins do?
They give the body structure, rigidity and strength. E.G collagen in ligaments and keratin in skin
9 of 18
What is a genotype?
This is a person's genetic makeup
10 of 18
What is a phenotype?
This is a person's observable physical features
11 of 18
Put the following in order of size; nucleus, cell, chromosomes, base, DNA, gene
(Cell)->(Nucleus)->(Chromosomes)->(DNA)->(Gene)->(Base)
12 of 18
How many pairs of chromosomes are in a human cell?
23 pairs or 46 chromosomes
13 of 18
What are the sex cells?
Eggs (Ova) and Sperm
14 of 18
How many chromosomes does a sperm have ?
23 chromosomes
15 of 18
How many chromosomes does an egg (ova) have ?
23 chromosomes
16 of 18
How many chromosomes does a zygote have (a fertilised egg)?
46 chromosomes (23 pairs) 23 from the mother + 23 from the father = full set of 46 chromosomes
17 of 18
What are alleles?
Alleles are the different forms in which the genes controlling a characteristic can occur.
18 of 18

Other cards in this set

Card 2

Front

Where are genes found in a cell?

Back

The nucleus

Card 3

Front

A gene is a section of what?

Back

Preview of the front of card 3

Card 4

Front

Lengthe of DNA are packed into structures called?

Back

Preview of the front of card 4

Card 5

Front

How many genes are there approximately on our chromosomes?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all DNA and inheritance resources »