Dna Genes Chromosomes

Question 1

What does a chromosome look like

Answer 1

A bubble written X

Question 2

What do chromosomes consist of

Answer 2

They are long lengths of dna coiled up

Question 3

What is a gene

Answer 3

A short section of DNA

Question 4

What does it mean by human body cells are diploid

Answer 4

It means they have to copy’s of each chromosome arranged in pairs

Question 5

How many chromosomes are in a human cell nucleus

Answer 5

46!!!! - so the diploid number for a human is 46

Question 6

Define the term genes in two words

Answer 6

Chemical instructions

Question 7

All of an organisms DNA makes up what

Answer 7

Genome

Question 8

Each separate gene in a DNA molecule is what ??

Answer 8

A chemical instruction that says how to make (codes for ) a particular protein

Question 9

Proteins determine what

Answer 9

Inherited characteristics

Question 10

There can be different versions of the same characteristic. The different versions of the same gene are called what ??

Answer 10

Alleles

Question 11

DNA is a double ……

Answer 11

Helix

Question 12

What does dna look like

Answer 12

Two strands coiled together in the shape of a double helix

Question 13

The two strands in dna are held together by chemicals called what

Answer 13

Bases

Question 14

What are the four different bases called

Answer 14

Adenine (A).
Cytosine (C).
Guanine (G).
Thymine (T)

Question 15

How are the bases paired

Answer 15

A-T.
C-G
It is called complementary base pairing