During the meiosis cell division, reduction in the number of chormosomes and exchange of segments between chromatids take place-Analyse what are the significances of these two phenomena.

During the meiosis cell division , reduction in the number of chromosome and exchange of segments between chromatids take place Analyse what are the significance of these two phenomena.

Difference between Euchromatin and Heterochromatin. What is the significance of mitotic cell division?

Whereas the number of chromosomes is reduced to half in first reduction division of meiosis, then what is the need for second meiotic division

Distinguish between mitotic and meiotic cell divisions in animals on the basis of following feature: - Number of cells produced list the changes in sence organs and bones ocurred during the senescence phase of human development.

Distinguish between mitosis and meiosis cell division based on the following features as directed : Number of daughter cells produced

Create a chart where the meiosis cell division takes place in organism. Compare G_1 and G_2 on the basis of synthesized material.

Assertion (A). Events in pachytene play a key role in evolutionary changes in organisms Reason (R) .Exchange of genetic material takes place between sister chromatids of homologous chromosomes

When synapsis is complete all along the chromosome, the cells are said to have entered a stage of prophase I, where exchange of genetic material takes place between homologous chromosomes. The stage is called

[A]: Choroid plexus is one of two thin-walled greatly folded highly vascular regions in the inner wall of the brain through which exchange of materials between blood and cerebrospinal fluid takes place. [R]: The choroid plexuses (which form the blood-brain barrier) bar the entry of blood cells and large molecules into the cerebrospinal fluid.

Name the stage of cell cycle at which one of the following events occur: (i) Chromosomes are moved to spindle equator (ii) Centromere splits and chromatids separate (iii) Pairing between homologous chromosomes takes place (iv) Crossing over between homologous chromosomes takes place