70 public questions tagged with this topic.
Linkage occurs when genes close to each other on the same chromosome are inherited together.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Chromosomal Theory Linkage Recombination Gene Mapping
Sutton and Boveri proposed the Chromosomal Theory of Inheritance, linking Mendel’s principles to chromosome behavior.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Chromosomal Theory Linkage Recombination Gene Mapping
Dominant traits are not necessarily more common; frequency depends on factors like natural selection and genetic drift.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Chromosomal Theory Linkage Recombination Gene Mapping
Thomas Hunt Morgan discovered sex-linked inheritance by studying eye color inheritance in Drosophila melanogaster.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Chromosomal Theory Linkage Recombination Gene Mapping
Some genes have more than two alleles, as seen in the ABO blood group system.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Chromosomal Theory Linkage Recombination Gene Mapping
Linked genes do not follow independent assortment; they tend to be inherited together unless crossing over occurs.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Chromosomal Theory Linkage Recombination Gene Mapping
Sutton and Boveri proposed the chromosomal theory of inheritance, linking chromosomes to Mendel’s principles.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Chromosomal Theory Linkage Recombination Gene Mapping
Crossing over can break the linkage between genes and create new allele combinations.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Chromosomal Theory Linkage Recombination Gene Mapping
Polygenic inheritance occurs when multiple genes contribute to a single phenotype, such as human height.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Polygenic Inheritance Pleiotropy and Quantitative Inheritance
Pleiotropy occurs when a single gene influences multiple phenotypic traits, as seen in sickle-cell anemia.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Polygenic Inheritance Pleiotropy and Quantitative Inheritance
Polygenic inheritance occurs when multiple genes contribute to a single phenotype, as seen in human height and skin color.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Polygenic Inheritance Pleiotropy and Quantitative Inheritance
Sickle-cell anemia is caused by a single base mutation in the β-globin gene, leading to abnormal hemoglobin.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Polygenic Inheritance Pleiotropy and Quantitative Inheritance
