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NCEA Level 1 Genetics
Revision cards
20
Science
4th Grade
08/28/2011

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Cards

Term
Mitosis
Definition
Cell division which produces 2 identical daughter cells
Term
Meiosis
Definition
Cell division which produces sex cells (gametes)
Term
Mutation
Definition
Random change in the DNA code of an organism
Term
Karyotype
Definition
A picture of the individual chromosomes of a cell.
Term
Genetics
Definition
The study of how living organisms inherit features from one generation to another.
Term
Fertilization
Definition
The joining of 2 gametes to make a zygote.
Term
Biodiversity
Definition
The variation in species within an ecosystem
Term
Gamete
Definition
A sex cell
Term
Gene
Definition
A length of DNA carrying the code for one feature
Term
Inheritance
Definition
The passing of certain traits from one generation to another.
Term
Allele
Definition
An alternative form of a gene.
Term
Trait
Definition
Characteristic, usually a physical characteristic of a living organism, such as the height of a plant or the hair colour of a mammal.
Term
Recessive
Definition
An allele that will be phenotypically expressed when both copies of the allele are identical.
Term
Pure-Breeding
Definition
When mated with their own kind, all the offspring resemble their parents.
Term
Phenotype
Definition
Observable traits or characteristics of an organism.
Term
Genotype
Definition
The genetic make-up of a cell or organism.
Term
Gene Pool
Definition
the sum of all the alleles shared by members of a single population
Term
Punnett Square
Definition
The Punnett square is a diagram that is used to predict an outcome of a particular cross or breeding experiment.
Term
Pedigree Chart
Definition
a diagram that shows the occurrence and appearance or phenotypes of a particular gene or organism and its ancestors from one generation to the next
Term
Genetic Variation
Definition
Gene flow, Mutations and Sex. Ensures a unique offspring.
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