Chapter 4.1 The Phenotypic Expression of Genes

Question 1

Define gene

Answer 1

A unit of heredity that transmit information from one generation to the next

Question 2

What does it mean when a gene is expressed?

Answer 2

Its expressed when a gene is read, transcribed and translated into a protein

Question 3

Define phenotype

Answer 3

The actual observable form taken by a specific feature in a particular individual, based on their genotype and influenced by the environment

Question 4

Define heredity

Answer 4

Heredity is the transmission of traits from one generation to the next

Question 5

Define variation

Answer 5

The diversity of genetic and phenotypic traits within and between populations

Question 6

What are the three mechanisms that produce variation?

Answer 6

-Environmental factors
-Mutation
-Sexual reproduction

Question 7

Name the main sources of genotypic variation

Answer 7

Mutations and sexual reproduction

Question 8

State the two mechanisms of phenotypic variation

Answer 8

Genotype and environment