Category: Chromosomes

Eukaryotic Chromosomes Organization MCQs with Answers

Eukaryotic Chromosomes Structure And Organization  In the Eukaryotic cell, the chromosome is composed of DNA and histone protein. DNA is the genetic material. DNA exists with protein in the fixed form. The chromosome shows two phases during the life cycle of the cell. These include; chromatin and chromosome. Chromatin consists of DNA and histone proteins. This association of DNA and protein helps in the…

MCQs on Sex Determination Protenor

Protenor Mode Of Sex Determination Work was started on sex determination in the early 1900s. This work was done on insect Protenor. In 1905, Nettie Stevens and Edmund Beecher Wilson independently discovered the chromosomal XY sex-determination system. According to this system, males have XY sex chromosomes while females have XX sex chromosomes. The Protenor mode of sex determination gave evidence about…

Crossing Over Meiosis MCQs

Genetic Linkage And Crossing Over Meiosis During the first meiotic division, the non-sister chromatids of the homologous chromosomes exchange DNA segments during crossing over. This process redistributes genetic information among the paired homologous chromosomes. Crossing over produces a new combination of genes on the various chromatids in homologous pairs. Thus, each chromatid ends with a new combination…

Practice MCQs Quiz on Sex Chromosomes Abnormalities

Sex Chromosomes Abnormalities – Definition During meiosis, physical and chemical disturbance and errors occur. They can damage chromosomes or alter their number in a cell and hence causes  chromosomes abnormalities and abnormalities of the sex chromosomes. Types of chromosome abnormalities can be; point mutation, chromosome number changes, and chromosome structure changes. These chromosome abnormalities are…