BIO 322 MIDTERM 3 (1)

BIO 322 MIDTERM 3 (1) - BIO 322 MIDTERM 3 - SPRING 2009...

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BIO 322 MIDTERM 3 - SPRING 2009 Question 1 Marks: 1 The presence of the enzyme __________ is required in order for testosterone to be converted to __________. This hormone is necessary for the differentiation of the _________. Choose one answer. a. hyaluronidase; estradiol; male external genitalia b. aromatase; testosterone; "gonadastat" along female lines c. 5 alpha reductase; estradiol; female internal genitalia d. 5 alpha reductase; dihydrotestosterone; male external genitalia e. hyaluronidase; dihydrotestosterone; female external genitalia Correct Marks for this submission: 1/1. Question 2 Marks: 1 In the development of the fetal gonads, the SRY gene on the Y chromosome causes the development of ________; the lack of the Y chromosome and the presence of _________ cause the development of ________. Choose one answer. a. testes; 2 X chromosomes; ovaries b. ovaries; 2 X chromosomes; testes c. testes; one X chromosome; ovaries d. ovaries; one X chromosome; testes Correct Marks for this submission: 1/1. Question 3 Marks: 1 The hormone that is directly responsible for the development of male neural circuitry in those parts of the brain controlling reproductive functioning is __________. This results in the _____________. Choose one answer. a. testosterone; cyclic release of hormones and one gamete per cycle b. progesterone; cyclic release of hormones and one gamete per cycle c. progesterone; cyclic release of hormones and one gamete per cycle d. estradiol (estrogen); acyclic (relatively constant) release of hormones and production of sperm Correct Marks for this submission: 1/1. Question 4
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Marks: 1 All of the following are true EXCEPT : Choose one answer. a. During oogenesis, 3 eggs (carrying 46 chromosomes each) and one polar body will be formed. b. During spermatogenesis, 4 sperm carrying 23 chromosomes will be formed from each spermatogonium. c. Male identical twins are more identical than female identical twins because only females have an X chromosome from the mother functioning in some tissue and an X chromosome from the father functioning in other tissue. d. If a fertilized egg divides into two separate cells, identical twins will occur. e. b,c & d Correct Marks for this submission: 1/1. Question 5 Marks: 1 All of the following are true EXCEPT : Choose one answer. a. The clitoris and the glans penis develop from the genital tubercle. b. Structures that develop from the same underlying tissue are said to be homologous. c. The penile shaft and the labia minora develop from the labioscrotal swelling. d. The Wolffian ducts develop into the epididymis, vas deferens, seminal vesicles and ejaculatory ducts. e. The labia minora and the penile shaft develop from the urogenital areas. f. Sertoli cells produce Mullerian Inhibiting Hormone in male fetuses.
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This note was uploaded on 09/06/2011 for the course BIO 322 taught by Professor Staff during the Spring '11 term at S.F. State.

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BIO 322 MIDTERM 3 (1) - BIO 322 MIDTERM 3 - SPRING 2009...

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