Question

Explain chtomosomal theory's in
detail.

Answer 1

Sutton and Boveri: (a) Walter Sutton and (b) Theodor Boveri are credited with developing the Chromosomal Theory of Inheritance, which states that chromosomes carry the unit of heredity (genes). ... During meiosis, homologous chromosome pairs migrate as discrete structures that are independent of other chromosomepairs. of Inheritance

The speculation that chromosomes might be the key to understanding heredity led several scientists to examine Mendel’s publications and re-evaluate his model in terms of the behavior of chromosomes during mitosis and meiosis. In 1902, Theodor Boveri observed that proper embryonic development of sea urchins does not occur unless chromosomes are present. That same year, Walter Sutton observed the separation of chromosomes into daughter cells during meiosis. Together, these observations led to the development of the Chromosomal Theory of Inheritance, which identified chromosomes as the genetic material responsible for Mendelian inheritance.
The Chromosomal Theory of Inheritance was consistent with Mendel’s laws and was supported by the following observations:

During meiosis, homologous chromosome pairs migrate as discrete structures that are independent of other chromosome pairs.

The sorting of chromosomes from each homologous pair into pre-gametes appears to be random.

Each parent synthesizes gametes that contain only half of their chromosomal complement.