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Mendelian Genetics

Mendelian Genetics Terms

TermDefinition
Heredity The passing on of traits from parents to offspring by means of genes.
Species A group of organisms capable of interbreeding and producing fertile offspring.
Variation Differences between members of the same species.
Gene A length of DNA that causes the production a protein.
Chromosomes Genes are found on these.
Polygenic trait A trait that is influenced by more than one gene.
Mendelian trait A single trait controlled by a single gene.
Gregor Mendel An Austrian Monk, he is considered the Father of Genetics.
Genotype The genetic makeup of an organism, i.e. the genes that are present.
Phenotype The physical makeup, or appearance, of an organism.
Allele A variation of a gene.
Dominant A trait that will come through even if there is only one copy of the allele.
Recessive A trait that needs two copies of the allele to be present in order to come through in the organism.
Homozygous An organism has two copies of the same allele. It can be either dominant or recessive.
Heterozygous An organism has two different copies of an allele.
Forty six The number of chromosomes that humans have.
Pea The type of plant that Gregor Mendel studied.
Hybrid This can be created if two members of different species reproduce, for example a mule.
Created by: Mr Delaney
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