Genetics And Evolution

Question 1

What causes variation?

Answer 1

Variation happens for two reasons:

• Inherited features (you get them from your parents)
• environmental features (caused by the environment)

Question 2

Examples of inherited features:

Answer 2

• Natural eye colour
• Blood groups
• Tongue rolling
• Natural hair colour

Question 3

Examples of environmental features

Answer 3

• Tatoos
• Tans
• Piercings
• Diffrent type of accents

Question 4

Continuous variation:

Answer 4

Data that can have any value e.g. Height, weight ( 4.7 kg or 193cm)

Bars can be joined in a bar chart

Question 5

Discontinuos variation:

Answer 5

Data that has to be put in categories e.g. Skin colour, eye couloir

Bars have to be apart not joined in a bar chart

Question 6

Who discovered DNA:

Answer 6

Rosalind Franklin, James Watson, Francis Livick

Question 7

Inside a cell there is a

Answer 7

Nucleus

Question 8

Inside a nucleus

Answer 8

There are 46 chromosomes , 23 from each parent

Question 9

Chromosomes are in

Answer 9

Pairs

Question 10

Each chromosomes

Answer 10

Contain thousands of genes

Question 11

Definition genes:

Answer 11

A section of a chromosome that codes for a specific protein, which determine our characteristics.

Question 12

One section of a gene is a

Answer 12

DNA

Question 13

Our characteristics are determined by

Answer 13

• environmental features
• Inherited features
• and a combination of both

Question 14

What is DNA

Answer 14

The DNA is a cell which contains all our characteristics, it is used to differentiate people because if not everyone would be the same.

Question 15

In a sex cell there are…

Answer 15

Only 23 chromosomes

Question 16

DNA has a…

Answer 16

Sugar phosphate back bone

A double helix structure

A 4 pair base
A+T
G+C

Question 17

Boys have….

Answer 17

X and y cells

Girls only have X and X cells

Question 18

A normal cell is called a….

Answer 18

Zygote