In the analysis of quantitative traits, positions on chromosomes called quantitative trait loci (QTLs) are often discussed. In the same context, restriction fragment length polymorphisms (RFLPs) are also discussed. What is the relationship between QTLs and RFLPs

RFLP technique can be used to develop useful polymorphic molecular markers for mapping QTLs.

Explanation:

A quantitative trait locus (QTL) is a fragment of DNA whose variation is associated with phenotypic traits controlled by numerous genes (i.e., quantitative traits) such as, for example, height, weight, etc. Restriction fragment length polymorphism (RFLP) is a technique useful to detect DNA polymorphisms (i.e., genetic variation) among samples. In RFLP, the genome is digested using restriction enzymes and these restriction fragments are subsequently separated by electrophoresis depending on their size, thereby producing differential gel bands among samples. These polymorphisms can be used to map QTLs and develop linkage maps, which is known as RFLP mapping.

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interphase

the period of cell growth when the cell synthesizes new molecules and organelles. the cell is not dividing and it constitutes the majority of the time spent in the cell cycle

prophase

changes occur in the nucleus and cytoplasm. the chromatin condenses to form structures (sister chromatids) visible with a light microscope and the mitotic spindle begins to form, but the nucleus is still in tact

prometaphase

the nuclear envelope fragments and the spindle microtubules attach to the kinetochores of the sister chromatids

metaphase

all the cell's duplicated chromosomes are lined up at an imaginary plane equidistant between the poles of the mitotic spindle

anaphase

begins when sister chromatids separate from each other and ending when a complete set of daughter chromosomes arrives at each of the two poles of the cell

telophase

the daughter nuclei form at the two poles of a cell

cytokinesis

the division of a cytoplasm to form two separate daughter cells. usually occurs during telophase during mitosis. this and mitosis make up to mitotic (m) phase of the cell cycle