Sex Chromosomes and Sex-Linked Genes

The book explores the evolution of sexual reproduction and its significance in genetic variability among organisms. It highlights how cross-fertilization enhances hereditary diversity and traces the origins of sexual reproduction from simple bacteria to multicellular organisms. The text delves into the differentiation of gametes and the development of true bisexuality, illustrating unique reproductive strategies, such as those in the worm Banelia viridis. It concludes by discussing the establishment of sex chromosomes, marking a pivotal advancement in the complexity of sexual reproduction.