Name a stain common used to colour chromosomes?

Name the phenomenon that occurs when homologous chromosomes do not separate during meiosis. Non-disjunction.

Use your brain power What do you mean by homologous chromosomes?

What are chromosomes? OR What is chromosome?

In eukaryotes, the process of division of a somatic parent cell into two daughter cells is known as mitosis. During the M or mitosis phase of a cell cycle, the chromosomes present in the nucleus are separated into two identical sets, which eventually form two daughter nuclei. This is followed by cytokinesis. Onion root tips are most commonly used to observe the different stages of mitosis in the laboratory. Each onion cell contains a total of eight chromosomes. DNA specific stains are used to visualise these chromosomes in different phases of mitosis. Name the stain that can be used to observe the different phases of mitosis.

Sex chromosomes are called………….. . homologous chromosomes autosomes allosomes metacentric chromosomes

Name the stage of cell cycle at which one of the folloiwng events occur : Chromosomes are moved to spindle equator.

Name the stage of cell cycle at which one of the folloiwng events occur : Crossing over between homologous chromosomes takes place.

The chromosome in which the centromere is near one end of the chromosome is called ……….chromosome. metacentric acrocentric sub-metacentric telocentric

Name two commonly used oxidizing agent

Name the following Pair of chromosomes similar in shape and organization.