Key Area 2.5 Variation and inheritance

Question 1

Define continuous variation

Answer 1

A range of variation between the extremes eg. Height

Question 2

Define allele

Answer 2

The form of a gene

Question 3

Define discontinuous

Answer 3

An alternative term for discrete which is variation that is clear cut and observable

Question 4

Define discrete

Answer 4

Variation that is clear cut and observable as catabolises

Question 5

Define dominant

Answer 5

Form of a gene that is expressed in the phenotype, homozygous or heterozygous

Question 6

Define heterozygous

Answer 6

Describes a genotype in which the two alleles for the characteristics are DIFFERENT

Question 7

Define homozygous

Answer 7

Describes a genotype in which the two alleles for the characteristics are the SAME

Question 8

Define phenotype

Answer 8

The visible characteristics of an organism that occur as a result of its genes

Question 9

Define polygenic

Answer 9

Inheritance determined by the interaction of several genes acting together

Question 10

Define discrete variation

Answer 10

The differences are clear cut and show a discontinuous pattern