Key words genetics
- Created by: une-meduse
- Created on: 18-05-13 16:08
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- KEY WORDS GENETICS
- GENOTYPE
- The genetic makeup of an organism
- It describes the organism in terms of the alleles it contains, usually in the context of a particular characteristic
- An organism with two identical alleles for a gene is homozygous
- An organism with two different alleles for the same gene are heterozygotes
- It describes the organism in terms of the alleles it contains, usually in the context of a particular characteristic
- The genetic makeup of an organism
- PHENOTYPE
- Refers to the characteristics that are expressed in an organism, those features which can be observed
- These are determined by genotype and environment
- Refers to the characteristics that are expressed in an organism, those features which can be observed
- DOMINANT
- An allele is said to be dominant if it is always expressed in the phenotype
- This is even if a different allele for the same gene is present in the genotype
- An allele is said to be dominant if it is always expressed in the phenotype
- RECESSIVE
- An allele is said to be recessive if it is only expressed in the phenotype in the presence of another identical allele
- CODOMINANT
- Two alleles for the same gene are said to be codominant if they are both expressed in the phenotype of a heterozygote
- LINKAGE
- Linkage refers to two or more genes that are located on the same chromosome
- The linked alleles of these genes are normally inherited together because they do not segregate independently at meiosis, unless chiasmata have been formed between them
- Linkage refers to two or more genes that are located on the same chromosome
- SEX LINKAGE
- A characteristic is sexed linked if the gene that codes for it is found on one of the sex chromosomes
- GENOTYPE
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