Variation & Inheritance wordbank
Term
Meaning
Species
Able to interbreed to produce fertile
offspring
Differences between individuals within
a species
Variation that has distinct groups for
organisms to belong to
Variation that has a range of values often measureable
Different forms of a gene
A part of a chromosome which controls
a specific feature of an individual
An allele which is always expressed,
often masking other alleles. Usually
identified as a capital letter, e.g. R
An individual who has inherited two
identical alleles, e.g. RR or rr
An allele which is rarely expressed, as
it is often masked by other alleles.
Usually identified as a lower case
letter, e.g. r
An individual who has inherited two
different alleles, e.g. Rr
The observable characteristics of an
organism
The full set of genes of an organism
When an individual of unknown
genotype is crossed with a homozygous
recessive individual.
Inheritance shown by 2 alleles that are
neither dominant or recessive – shown
in a mixed phenotype in heterozygotes
Determine gender in an individual
Variation
Discrete variation
Continuous variation
Allele
Gene
Dominant
Homozygous
Recessive
Heterozygous
Phenotype
Genotype
Testcross
Co-dominance
Sex Chromosomes
Words:
allele , co-dominance, continuous variation, discrete variation, dominant , gene, genotype,
heterozygous, homozygous, phenotype , recessive, sex chromosomes, species, test-cross,
variation