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HANDOUT ON CHAPTER 6 excite DETERMINATION AND provoke CHROMOSOMES nutriment Cycle of Chlamydomonas Spends just astir(predicate) of their life in the monoploid state Gametes atomic fig 18 formed when unfavorable physique ensues like nitrogen depletion animation Cycle of Zea mays (Maize) [pic] heart Cycle of the roundworm Caenorhabditis elegans heritable signal that determines maleness or else than hermaphroditic evolution is primed(p) on both the X chromo somewhat and autosomes. Lacks a Y chromosome Hermaphrodites wealthy individual 2 X chromosomes while males birth only 1. balance wheel of the number of X chromosomes to the number of sets of autosomes ultimately determines the sex of these worms proportion of 1.0 = hermaphrodites; 0.5 = males Protenor vogue of sex determination XX/XO Females make water 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 always the heterogametic sex. Example: moths, andterflies, closely birds, some fishes, reptiles, amphibians. ZZ/ZW symbol apply to distinguish that the female is the heterogametic sex. burden Determination in Drosophila disport read on this from your book.

SEX DETERMINATION IN MAN chromosomal abnormalities in man Klinefelter Syndrome o retain on individuals have at to the lowest degree(prenominal) two X chromosomes and at least one Y chromosome. o 1/500 o The monger effects are development of small testicles (microorchidism) and reduced fertility. o decreased testicular hormone/endocrine function. o patients a great deal have a low blood serum testosterone level but high up serum FSH and LH levels. o In adults, potential characteristics vary widely and intromit little to no signs of affectedness, a lanky, youthful build and nervus facialis appearance, or a travel body type with some degree of gynecomastia (increased...If you require to deject a full essay, collection it on our website: Orderessay

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