Cellular control - important terms

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  • Created by: Steff06
  • Created on: 24-04-16 17:49
Genotype
The genetic make-up of an organism. Describes alleles an organism contains.
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Homozygous
An organism with two identical allele for a particular gene.
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Heterozygous
An organism with two different alleles of the same gene.
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Autosomes
All the chromosomes apart form the sex chromosomes.
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Phenotype
Characteristics that are expressed in the organism. Determined by genotype and environment.
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Dominant allele
Always expressed in the phenotype, even if a different allele for the same gene is present in the genotype.
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Recessive allele
Only expressed in the phenotype in the presence of another identical allele or in the absence of a dominant allele.
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Codominant
Two genes that are both expressed in the phenotype of a heterozygote.
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Linkage
Two or more genes that are located on the same chromosome.
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Crossover
Alleles from one chromatid become linked to alleles on the other chromatid.
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Sex-linkage
Characteristic is sex-linked if the gene that codes for it is found on one of the sex (X and Y) chromosomes.
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Other cards in this set

Card 2

Front

An organism with two identical allele for a particular gene.

Back

Homozygous

Card 3

Front

An organism with two different alleles of the same gene.

Back

Preview of the back of card 3

Card 4

Front

All the chromosomes apart form the sex chromosomes.

Back

Preview of the back of card 4

Card 5

Front

Characteristics that are expressed in the organism. Determined by genotype and environment.

Back

Preview of the back of card 5
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