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HANDOUT ON CHAPTER 6 invoke DETERMINATION AND switch on CHROMOSOMES living Cycle of Chlamydomonas Spends just about of their lifetime in the haploid state Gametes atomic number 18 formed when unfavorable condition ensues like nitrogen depletion animation Cycle of Zea mays (Maize) [pic] Life Cycle of the roundworm Caenorhabditis elegans inherited signal that determines maleness rather than hermaphroditic development is primed(p) on both the X chromosome and autosomes. Lacks a Y chromosome Hermaphrodites wealthy individual 2 X chromosomes while males have only 1. holding of the number of X chromosomes to the number of sets of autosomes ultimately determines the excite of these worms harmonise of 1.0 = hermaphrodites; 0.5 = males Protenor vogue of sex determination XX/XO Females have 12 autosomes and 2 X chromosomes (homogametic) Males have 12 autosomes and 1 X (heterogametic) Lygaeus mode of sex determination XX/XY Females have 12 autosomes and 2 X chromosomes (homogametic) Males have 12 autosomes and 2 sex chromosomes X & Y (heterogametic) Note: Males are not eer the heterogametic sex. Example: moths, andterflies, most birds, some fishes, reptiles, amphibians. ZZ/ZW symbol used to realise that the female is the heterogametic sex. rouse Determination in Drosophila revel read on this from your book.

SEX DETERMINATION IN gay Chromosomal abnormalities in man Klinefelter Syndrome o bear on individuals have at to the firstest degree(prenominal) two X chromosomes and at least one Y chromosome. o 1/500 o The barg ainer effects are development of small testi! cles (microorchidism) and cut fertility. o decreased testicular hormone/endocrine function. o patients a great deal have a low serum testosterone level but high serum follicle-stimulating hormone and LH levels. o In adults, possible characteristics vary widely and include little to no signs of affectedness, a lanky, youthful clear and facial appearance, or a rounded body persona with some degree of gynecomastia (increased...If you require to get a all-inclusive essay, order it on our website: BestEssayCheap.com

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