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TRBC Bio M8 Terms
Terms for Module 8
Question | Answer |
---|---|
True breeding | If an organism has a certain characteristic that is always passedon to its offspring, we say that this organism bred true with respect to that characteristic. |
Allele | One of a pair of genes that ocupies the same position on homologous chromosomes |
Phenotype | The observable expression of an organism's genes |
Homozygous genotype | A genotype in which both alleles are identical. |
Hetrozygous genotype | A genotype with two different alleles. |
Dominant allele | An allele that will determine phemotype if just one is present in the genotype. |
Recessive allele | An allele that will not determine the phenotype unless the genotype is homozygous in that allele. |
Pedigree | A diagram that follows a particular phenotype through several generations. |
Monohybrid cross | A cross between two individuals, concentrating on only one definable trait. |
Dihybrid cross | A cross between two individuals, concentrating on two definable traits. |
Autosomes | Chromosomes that do not determine the sex of an individual. |
Sex Chromosomes | Chromosomes that determine the sex of an individual. |
Antigen | A protein that, when introduced in the blood, triggers the production of an antibody. |
Autosomal inheritance | Inheritance of a genetic trait not on a sex chromosome. |
Genetic disease carrier | A person who is heterozygous in a recessive genetic discorder are called genetic disease. |
Sex-linked inheritance | Inheritance of a genetic trait located on the sex chromosomes. |
Mutation | A radical chemical change in one or more alleles |
Change in chromosome structure | A situation in which a chromosome loses or gains genes during meiosis. |
Change in chromosome number | A situation in which abnormal cellular events in meiosis lead to either none of a particular chromosome in the gamete or more than one chromosome in the gamete. |