1.2.1 Organisation Of DNA In The Cell

Question 1

What is DNA?

Answer 1

Genetic material

Question 2

What does DNA stand for?

Answer 2

Deoxyribo Nucleic Acid

Question 3

What is a gene?

Answer 3

• Made of DNA
• code for proteins that give you inheritance characteristics

Question 4

What are chromosomes?

Answer 4

• Thread like structures
• made of genes

Question 5

What are DNA bases made off?

Answer 5

Sugar phosphate

Question 6

What are the four different bases?

Answer 6

A, C, G, T

Question 7

Base pairs

Answer 7

A and T
C and G

Question 8

Organisation of genetic information

Answer 8

Cell
Nucleus
Chromosome
Gene
DNA

Question 9

Diploid number in humans

Answer 9

46

Question 10

Haploid number in humans

Answer 10

23

Question 11

What are chromosomes not normally visible under a light microscope?

Answer 11

-They are too thin to be visible
- The resolution on a light microscope isn’t high enough

Question 12

Why do chromosomes appear as an x shape?

Answer 12

two identical copies joined in the middle

Question 13

What is an allele?

Answer 13

When you have two copies og her same genes

Question 14

Types of cells that dint have 23 pairs of chromosomes?

Answer 14

Red blood cell
Sperms cell
Egg cell

Question 15

What are there many different chromosomes instead of one big one?

Answer 15

When cells divide, if it is one big molecule, it would get tangled up when the two copies are pulled apart

Question 16

What is the 23 pair of chromosomes called?

Answer 16

The sex chromosomes

Question 17

What are the two forms of sex chromosomes?

Answer 17

X and Y
XX =female
XY =male