Key Words

Question 1

Allele

Answer 1

A form of a gene

Question 2

Genotype

Answer 2

The alleles a organism contains

Question 3

Phenotype

Answer 3

Observable characteristics of an organism
Determined by genotype and environment

Question 4

Dominant

Answer 4

Allele if present always expressed

Question 5

Co-dominant

Answer 5

2 different alleles are described as co-dominant if both are expressed in the phenotype

Question 6

Hetrozygote - heterogenous

Answer 6

An organism has different alleles at a particular locus

Question 7

Linkage

Answer 7

Genes that are on the same chromosome and tend to be inherited together

Question 8

Epistasis

Answer 8

When the allele of one gene affects or makes the expression of another in the phenotype

Question 9

Ecosystem

Answer 9

All the biotic and abiotic factors in a particular area
Factors are interacting and interdependent to make up a self supporting system

Question 10

Environment

Answer 10

All the factors in a habitat which affect an organism
- can be biotic or abiotic

Question 11

Population

Answer 11

All members of a species in a habitat at one time

Question 12

Community

Answer 12

All organism (biotic factors) in a habitat at one time

Question 13

Habitat

Answer 13

Geographical area occupied by species

Question 14

Niche

Answer 14

The role of a species in a ecosystem

Question 15

Mark-release-recapture

Answer 15

Method of estimating number of organisms

Estimated pop size= total in 1st sample x total in 2nd sample/ number of marked individuals recaptured

Question 16

Succession

Answer 16

Process a biological community evolves/changes over time

Question 17

Pioneer species

Answer 17

First species to occupy a new habitat

Pioneer species change the abiotic environment so that it becomes less hostile for other species

Question 18

Climax community

Answer 18

End result of succession
= stable community with variety of plants + animals