Question

Incomplete linkage is A.
Complete linkage is B.
Choose the correct option for A and B.
A. A common , B rare
B. A rare, B common
C. A impractical, B practical
D. A practical, B impractical

Answer 1

In the successive generations inheritance and absence of the crossing over or gene are present on the single chromosomes. This phenomenon is naturally found in the rare nature. But in the case of incomplete linkage the ability of the crossing over and gene present on the same chromosomes in the linked genes and the phenomenon is found common in nature.

Complete answer:
The two alleles for one gene segregated independently of the alleles for the other genes during the independent assortment in the case of gamete formation. The process not followed the Mendelian inheritance pattern and unable to assort indepently in the case of two genes are found on the same chromosomes. And linked genes obtained by the genes inheritance together in the gametes formation.

During the meiosis the chromosomes to be inherited together during the genetic linkage in which tendency of the alleles that are located together with each other. Genetically linked genes obtained during the chromosomal crossover and chromatids in the gene loci that are nearer to each other and less likely to be separated during the gametes formation. The movement of the alleles found in the same chromosomes discovered by the genetic linkage experiment in the year 1905 by the Williams Batsman and Reginald Punnet. Chromosomes are packed into the genes with the help of linkage and transmission of the genetic material from the chromosomes that organize the genes for safe coordination.

Hence, the correct answer is option (A).

Note: The effects of the complete linkage and independent assortment occurred during the crossing over between the linked genes. In the pea plants and homologous part of the sex chromosomes are the example of incomplete linkage. And on the other side complete linkage seen in the case of drosophila in which crossing over did not occur in the second chromosomes of the male and allowing no crossing over in the female due to the recessive genetic disorders.