_ is the exact position of a gene on the chromosome.
Correct answer: D. Locus
- A. Trait
- B. Centromere
- C. Genotype
- D. Locus
Explanation
A locus is a specific, fixed position on a chromosome where a particular gene or genetic marker is located. A phenotypic trait, simply trait, or character state is a distinct variant of a phenotypic characteristic of an organism. The centromere is the specialized DNA sequence of a chromosome that links a pair of sister chromatids. A genotype is an organism's complete set of genetic material. Often though, genotype is used to refer to a single gene or set of genes, such as the genotype for eye color.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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