Genetics & Chromosomes Flashcards
Gene
Section of DNA that codes for a particular trait or characteristics
Allele
A different form of a gene that codes for a different version of a characteristics
Genotype
A description of a pair of alleles present for a characteristic
Phenotype
The physical expressionof the the alleles
Variation
Variationis due to either environmental or inheritance (Genetic) or both
Homozygous
Pair off alleles that produce a characteristic are the same, e.g. HH
Heterozygous
Pair of alleles that produce a characteristic are different, e.g. Hh
Dominant
An allele that will always be expressed even when there are only one of these alleles present, represented by a capital letter
Recessive
An allele that will only be expressed when both alleles are of this type e.g hh.
Characteristics
A feature of an organsim
Cutting
Small section of a plant is taken and planted
Gene pool
The variety of genes available in a population
Sexual reproduction
Roproduction that involves gametes and two parents
Dolly the Sheep
An example of cloning
Asexual reproduction
Reproduction without gametes and with only one parent
