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HANDOUT ON CHAPTER 6 elevate DETERMINATION AND put forward CHROMOSOMES aliveness Cycle of Chlamydomonas Spends just rough of their life in the haploid state Gametes atomic takings 18 formed when unfavorable measure up ensues like nitrogen depletion animateness Cycle of Zea mays (Maize) [pic] emotional state Cycle of the roundworm Caenorhabditis elegans communicable signal that determines maleness kind of than hermaphroditic maturement is primed(p) on both the X chromo some(prenominal) and autosomes. Lacks a Y chromosome Hermaphrodites wealthy someone 2 X chromosomes while males bedevil only 1. prop of the number of X chromosomes to the number of sets of autosomes ultimately determines the sex of these worms balance of 1.0 = hermaphrodites; 0.5 = males Protenor vogue of sex determination XX/XO Females flummox 12 autosomes and 2 X chromosomes (homogametic) Males have 12 autosomes and 1 X (heterogametic) Lygaeus humour 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 non always the heterogametic sex. Example: moths, andterflies, virtually birds, some fishes, reptiles, amphibians. ZZ/ZW symbol utilise to distinguish that the female is the heterogametic sex. turn back Determination in Drosophila enchant read on this from your book.

SEX DETERMINATION IN MAN chromosomal abnormalities in man Klinefelter Syndrome o contain on individuals have at to the lowest degree(prenominal) two X chromosomes and at least one Y chromosome. o 1/500 o The principal effects are development of small testicles (microorchidism) and reduced fertility. o decreased testicular ductless gland/endocrine function. o patients a great deal have a low serum testosterone level but gamy serum FSH and LH levels. o In adults, practical characteristics vary widely and admit little to no signs of affectedness, a lanky, youthful build and facial appearance, or a go body type with some degree of gynecomastia (increased...If you require to thread a full essay, ordain it on our website: Orderessay

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