CHANGE IN CHROMOSOMAL STRUCTURE AND NUMB
abidaPhysical and chemical disturbance and errors occur during meiosis. They damage chromosome or alter their number in a cell. There can be folloyn chromosomal alterations: Point mutation The change of…
CHROMOSOMES AND GENE LINKAG
EUKARYOTIC CHROMOSOMES The chromosome is composed of DNA and histone protein. DNA is the genetic material. It exists with protein in the fix form. The chromosome shows following phases: Chromatin…
DEFINITIONS AND KEY POINTS OF INHERITENCE PATTERN
TERMS 'gut. DEFINITIONS Mendel's law of segregation The law of Mendel states that "the allele of gene present on the homologous chromosomes segregates during meiosis in such a way…
INHERITANCE PATTERN
MENDELIAN INHERITANCE PATTERN PRINCIPLE OF SEGREGATION The law of Mendel states that the allele of gene present on the homologous chromosomes segregates during meiosis in such a way that each…
OBJECTIVES OF CELL DIVISION
Mole Choice Questions MCQs Four options are given at the end of each statement. You should encircle one option from them. The centromere is a specific DNA sequence of about…
MODEL SUBJECTIVE QUESTION OF CELL DIVISION
Write on cell cycle Give mechanism of control of cell cycle. Write not on mitosis. Describe different step of meiosis. Discuss spermatogenesis and oogenesis.
DEFINITIONS AND KEY POINTS Of Cell Division
TERMS DEFINITIONS I Cell cycle I The period from the time a cell is produced until it completes mitosis is called cell cycle. Mitcjsis The type of…
Meiosis : The basis of sexual reproduction
Meiosis is a type of cell division in which number chromosome reduced to one half in the daughter cell. Sexual reproduction requires a genetic ontribution from two different sex cells.…
CONTROL OF CELL CYCLE
Different cells have different duration of cell cycle. Some cell actively divides like liver cells. But some cell never divides again like nerve cell. GI phase is a key period…
MITOSIS
The type of cell division in which number of chromosomes remains constant in the daughter generations is called mitosis. Mitosis is divided intc four phases: prophase, metaphase, anaphase, and telophase.…