Principle of Inheritance and VariationMediumBloom L3
Question
Position of a gene on chromosome is called
Options
A.locus
B.factor
C.cistron
D.nucleosome
Solution
Sol.(a) [Key Concept: Locus — Gene Position on Chromosome] The position (location) of a gene on a chromosome is called its LOCUS (plural: loci). Alleles of a gene occupy the same locus on homologous chromosomes. The locus is a specific physical location on the chromosome defined by its position relative to other genes (genetic map) or its cytological position (cytological map). Factor = Mendel's term for gene; Cistron = functional unit of DNA encoding one polypeptide; Nucleosome = chromatin structural unit.
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