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*  Sex-determination system - Wikipedia
... unlike the rest of the chromosomes (autosomes), and are sometimes called allosomes. In some species, such as humans, organisms ... "In the platypus a meiotic chain of ten sex chromosomes shares genes with the bird Z and mammal X chromosomes". Nature. 432 ( ... A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. ... sex chromosomes share no homologues with eutherian sex chromosomes. Instead, homologues with eutherian sex chromosomes lie on ...
  https://en.wikipedia.org/wiki/Sex-determination_system
*  Y chromosome - Wikipedia
The Y chromosome is one of two sex chromosomes (allosomes) in mammals, including humans, and many other animals. The other is ... 2004). "In the platypus a meiotic chain of ten sex chromosomes shares genes with the bird Z and mammal X chromosomes". Nature. ... evolved new X and Y chromosomes through fusions of the ancestral sex chromosomes and autosomes. Fisher's principle outlines why ... "sex locus" - simply possessing this allele caused the organism to be male. The chromosome with this allele became the Y ...
  https://en.wikipedia.org/wiki/Y_chromosome
*  DEPARTMENT OF BIOTECHNOLOGY B.Sc. SYLLOBUS ... - TechyLib
Unit 4: Sex Determination in Plants and animals. Concept of allosomes and autosomes. XX-XY-XX-XO-ZW-ZZ ZO-ZZ types 2. hrs. Unit ... 2. Cell division Mitotic and meiotic studs in grasshopper testes. Onion root tips and flower 1. 3. Chromosomes: Mounting of ... 12) Describe the different methods of isolating a micro-organism and screening of microbes.. 13) Explain the steps involved in ... Special types of chromosome: Salivary gland and Lamp brush chromosomes 6. hrs.. Unit 5. Cell division. Cell cycle, imitosis and ...
  https://www.techylib.com/el/view/collectiveyazoo/department_of_biotechnology_b.sc._syllobus