Question

According to the chromosomal theory of inheritance

• A. chromosomes condense during anaphase of cell division
• B. chromosomes align at the equator during telophase
• C. chromosomes carry factors
• D. genes are non-hereditary units

Answer 1

The correct option is C chromosomes carry factors

Chromosomal theory of inheritance was proposed by Sutton and Boveri. They proposed that factors (genes) are located on the chromosomes. This was experimentally proved by Morgan.

Cell division includes karyokinesis and cytokinesis. The karyokinesis includes four phases: prophase, metaphase, anaphase and telophase.

During prophase, the chromatin condenses to form chromosomes. It is followed by metaphase during which the chromosomes align at the equatorial plate. During anaphase, the chromosomes separate and are pulled towards opposite poles. At telophase, the chromosomes decondense to form chromatin.

Genes are hereditary units which were called factors by Mendel. They contain the information that is required to express a particular trait in an organism.