Handouts

HANDOUT ON CHAPTER 6 invoke DETERMINATION AND call forth CHROMOSOMES living Cycle of Chlamydomonas Spends just about of their conduct in the haploid state Gametes atomic number 18 formed when unfavorable condition ensues like nitrogen depletion life Cycle of Zea mays (Maize) [pic] Life Cycle of the roundworm Caenorhabditis elegans communicable signal that determines maleness rather than hermaphroditic development is primed(p) on both the X chromosome and autosomes. Lacks a Y chromosome Hermaphrodites wealthy psyche 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 sex of these worms similarity 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 autosom es 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 grade that the female is the heterogametic sex. rouse Determination in Drosophila gratify read on this from your book.

SEX DETERMINATION IN soldiery 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 (microorchidi sm) and lessen fertility. o decreased! testicular hormone/endocrine function. o patients a great deal have a down in the mouth serum testosterone level but high serum follicle-stimulating hormone and LH levels. o In adults, possible characteristics vary astray and include little to no signs of affectedness, a lanky, youthful shape and facial appearance, or a rounded body fiber with some degree of gynecomastia (increased...If you require to get a expert essay, order it on our website: OrderEssay.net

If you want to get a full information about our service, visit our page: write my essay