Question

According to the Chromosomal Theory of Inheritance, chromosomes serve which fundamental role in heredity?

Options

• They are the physical carriers of Mendelian factors (genes)

• They regulate the expression of all proteins

• They determine the sex of organisms exclusively

• They store energy for cellular processes

Answer 1

The first postulate of the Chromosomal Theory establishes that chromosomes are the physical carriers of Mendelian factors (genes). This foundational principle states that genes—the units of heredity—are physically located on chromosomes at specific positions called loci, thereby establishing the cytological basis for all Mendelian inheritance patterns.