Inheritance , Variation And Survival

Question 1

Chromosomes

Answer 1

Long coiled up lengths of a molecule called DNA

Question 2

DNA

Answer 2

long list of chemical instructions on how to build an organism

Question 3

Gene

Answer 3

Short section of a chromosome ( DNA )

Question 4

Double helix

Answer 4

A spiral made of two chains wound together

Question 5

Heredity

Answer 5

The process by which genes are passed down from parents to their offspring

Question 6

What 2 scientists built the model of the DNA? What was the date?

Answer 6

Crick and Watson. 1953

Question 7

How did the scientists build the model of DNA?

Answer 7

They used data from other scientists , to help them understand the structure of the molecule

Question 8

Continuous variation

Answer 8

Where the feature can have any value at all e.g height , weight and intelligence

Question 9

Discontinuous variation

Answer 9

The feature can only take certain values e.g a person’s blood group

Question 10

Variation

Answer 10

Differences between living things

Question 11

Characteristic feature

Answer 11

A difference

Question 12

Natural selection

Answer 12

The process in which a characteristic gradually becomes more ( or less ) common in a population