The nucleus is the largest membranous organelle of the cell. It contains the chromosomes together with the machinery for DNA replication and RNA transcription and processing. The nucleus directs the process of protein synthesis...
Mutation is a sudden change in the nature of the hereditary factors that control certain traits, which leads to a change of these traits in the living organism, Causes of mutation are due to...
Sex-linked traits Sex-linked characteristics are the characteristics that their genes are located on sex chromosomes X & Y and their appearance isn’t affected by sex hormones, During studying the eye colour character in Drosophila...
Sex determination in humans By discovering sex chromosomes , Scientists decided that man is responsible for determining the sex of fetus , not the woman as was believed before , In the nucleus of...
