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HANDOUT ON CHAPTER 6 invoke DETERMINATION AND trip out CHROMOSOMES living Cycle of Chlamydomonas Spends just about of their sustenance 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 transmittable signal that determines maleness rather than hermaphroditic development is primed(p) on both the X chromosome and autosomes. Lacks a Y chromosome Hermaphrodites wealthy mortal 2 X chromosomes while males have only 1. prop of the number of X chromosomes to the number of sets of autosomes ultimately determines the get off of these worms property 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 1 2 autosomes and 2 X chromosomes (homogametic) Males have 12 autosomes and 2 sex chromosomes X & Y (heterogametic) Note: Males are not invariably the heterogametic sex. Example: moths, andterflies, most birds, some fishes, reptiles, amphibians. ZZ/ZW symbol used to love that the female is the heterogametic sex. rouse Determination in Drosophila enliven read on this from your book.

SEX DETERMINATION IN part Chromosomal abnormalities in man Klinefelter Syndrome o bear on individuals have at least(prenominal)(prenominal) two X chromosomes and at least one Y chromosome. o 1/500 o The bargainer effects are development of small testicles (m icroorchidism) and cut down fertility. ! o decreased testicular hormone/endocrine function. o patients a great deal have a crushed serum testosterone level but high serum follicle-stimulating hormone and LH levels. o In adults, possible characteristics vary wide and include little to no signs of affectedness, a lanky, youthful phase and facial appearance, or a rounded body event with some degree of gynecomastia (increased...If you require to get a effective essay, order it on our website: OrderEssay.net

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