Natural Selection Keywords. Flashcards
Alleles.
Different variations of the same gene.
Asexual Reproduction.
Reproduction that only requires one parent; results in clones.
Gametes.
Sex cells.
Variation.
Differences within a species.
Sexual reproduction.
Reproduction that involves two parents, resulting in variation.
Fertilisation.
The joining of two gametes.
Mutation.
Change in the sequence of the DNA bases.
Environmental Variation.
Variation caused by the environment.
Clone.
An organism which is genetically identical to its parents.
Punnett Square.
A diagram used to show the possible genetic makeup of offspring based on the mother and father’s genes.
Cancer.
A disease that occurs as a result of cell changes that leads to uncontrolled growth and division.
Dominant Allele.
The allele whose characteristics are always expressed if present in the genotype.
Recessive Allele.
The allele whose characteristics are only expressed if there are two copies present in the genotype.
Genotype.
The combination of alleles present in an organism.
Discontinuous Variation.
Characteristic which fall into distinct groups.
