Here's the list of terms explained during our lessons this week:
- Gene: a unit of inheritance
- Alleles: an alternate form of gene
- Dominant: an allele that masks the expression of another allele
- Recessive: an allele whose expression is masked by the activity of another allele
- Codominant: alleles that are both expressed in the heterozygote
- Autosome: a non-sex chromosome
- Genotype: genetic constitution of an individual
- Phenotype: observable expression of a genotype
- Heritability: the proportion of a trait attributable to heredity
- Heterozygous: possessing two different alleles for a particular gene
- Homozygous: possessing two identical alleles for a particular gene
- Independant assortment: random organization of chromosome homologs during metaphase I of meiosis I
- Segregation: allele separation during meiosis
- Law of segregation: Mendel's principle stating that one of each gene pair is placed in a separate gamete
- Mutant: a phenotype or allele that is not most common for a certain gene in a population or has been altered from the normal condition
- Pedigrees: a chart showing relationships of relatives and which ones have a particular trait
- Polygenic: a trait caused by more than one gene
- Punnett square: a device used to diagram the various possible genetic results of combining gametes
- Wild-type: the most common phenotype or allele for a certain gene in a population
- Pure breed: the plant carries two genes that are the same for a particular trait and these genes are passed on from the plant to the progeny through self-fertilization only
For those who have the new Success, you can refer to Pg. 518 for the list of terms.
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