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Psychology 2035A/B Lecture Notes - Pubic Hair, Y Chromosome, Sexual Differentiation

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coffeegoose778
15 Apr 2012
School
Western University
Department
Psychology
Course
Psychology 2035A/B
Professor
Doug Hazlewood

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Document Summary

Mother"s egg 23 chromosomes ( x sex chromosome) Father"s sperm ( x or y sex chromosome) If x sperm fertilizes egg = genetic female (xx) If y sperm fertilizes egg = genetic male (xy) The first stage in becoming a male or a female. For several weeks after conception you won"t have reproductive organs: not a female or male yet. Development of reproductive organs: testes or ovaries. Problems: true hermaphrodite: genetic female with tiny piece of y chromosome attached (xxy, big enough to stimulate development of testes; not big enough to inhibit development of ovaries (therefore both) Development of sex organs: penis or clitoris and vagina. Testes produce androgens: when androgens are present; penis develops. The adam principle: when absent, clitoris and vagina develop. Genetic female with unusually active adrenal glands (produce androgens) Fetus develops sex organs that appear to be male (clitoris is enlarged, vagina is fused: androgen-insensitivity syndrome.

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Related Questions

46. Which of the following statements about genetic transmission from parents to offspring is true? A) 46 chromosomes from the egg combine with 46 chromosomes from the sperm B) 23 chromosomes from the egg combine with 23 chromosomes from the sperm regardless of the gender of the child C) all 46 chromosomes in a developing fetus come from the egg regardless of the gender of the child D) all 46 chromosomes in a developing fetus come from the sperm regardless of the gender of the child E) all 46 chromosomes in a developing fetus come from the egg if the child is female, and all 46 chromosomes in a developing fetus come from the sperm if the child is a boy

46. Which of the following statements about genetic transmission from parents to offspring is true? A) 46 chromosomes from the egg combine with 46 chromosomes from the sperm B) 23 chromosomes from the egg combine with 23 chromosomes from the sperm regardless of the gender of the child C) all 46 chromosomes in a developing fetus come from the egg regardless of the gender of the child D) all 46 chromosomes in a developing fetus come from the sperm regardless of the gender of the child E) all 46 chromosomes in a developing fetus come from the egg if the child is female, and all 46 chromosomes in a developing fetus come from the sperm if the child is a boy

45. A chromosome is: A) synonymous with the term "gene" B) a coiled molecule of DNA that is covered by protein C) the portion of the gene that carries the hereditary blueprint D) the observable characteristics produced by a given genetic makeup E) synonymous with the term "phenotype"