Genetics and Variation

Question 1

Different forms of the same gene

Answer 1

Allele

Question 2

Thread-like structure made of DNA

Answer 2

Chromosone

Question 3

Variation with no limit for the for the population e.g. height.

Answer 3

Continuous Variation

Question 4

Variation with distinct groups e.g. eye colour

Answer 4

Discrete Variatian

Question 5

Material that genes are made of

Answer 5

DNA

Question 6

Characteristic expressed in both homozygous condition and heterozygous condtion

Answer 6

Dominant

Question 7

Variation caused by the environment in which offspring is brought up

Answer 7

Environmental Variation

Question 8

Process by which organisms have developed from earlier forms of life

Answer 8

Evolution

Question 9

The complete disappearance of species from Earth

Answer 9

Extinction

Question 10

The remains or impression of a prehistoric plant embedded in rock and preserved in petrified form

Answer 10

Fossil

Question 11

Section of DNA that codes for a particular characteristic

Answer 11

Gene

Question 12

The two alleles that an organism has e.g. Pp

Answer 12

Genotype

Question 13

Two different alleles e.g. Aa

Answer 13

Heterozygous

Question 14

Two copies of the same alleles e.g. aa

Answer 14

Homozygous

Question 15

Variation caused by the genes offspring inherit from their parents

Answer 15

Inherited Variation

Question 16

Animal without backbone

Answer 16

Invertebrete

Question 17

Process where organisms better adapted to their environment survive to breed and pass on their genes

Answer 17

Natural Selection

Question 18

Physical appearance due to your genotype

Answer 18

Phenotype

Question 19

Characteristic only expressed in the homozygous condition.

Answer 19

Recessive

Question 20

Animal with backbone

Answer 20

Vertebrate

Question 21

Scales, live in water, cold-blooded.

Answer 21

Fish

Question 22

Smooth skin, live in water and land, cold-blooded

Answer 22

Amphibian

Question 23

Scales, lay eggs, cold-blooded, lungs

Answer 23

Reptile

Question 24

Hair, warm-blooded, live births, lungs

Answer 24

Mammals

Question 25

Feathers, warm-blooded, lay eggs, lungs

Answer 25

Bird

Question 26

Environment changes quickly
a new predator
A new disease
Competition with species and food
Catastrophe

Answer 26

Reasons for extinction