21 - Insect Reproduction

21 - Insect Reproduction - Insect Reproduction Entomology...

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Insect Reproduction Entomology (BIOL 409) Fall 2004, Lecture # 21 Check out this ppt presentation
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Insect Reproduction Outline Hormones and Reproduction Reproductive Organs Male Female Sex Determination Reproductive Strategies
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Hormones and Reproduction Review of hormones during development/molting ECDs and JH assume new roles as gonadotropins In male Testes development Spermatogenesis Fluids of accessory glands In female Ovary development Oogenesis, follicle development Note to self: See overheads
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Male Reproductive System Functions Sperm production Sperm transfer Gonads (testes) Paired, bilaterally arranged Site of spermatogenesis Contain multiple sperm tubes Housed in peritoneal sheath Transfer structures Vas efferens Vas deferens Seminal vesicles Aedeagus and ejaculatory duct an aedeagus (penis),which is sclerotized and may be intricate
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Spermatogenesis Occurs in sperm tubes May be continuous process May occur once in the life cycle Spermatozoa exit sperm tubes Stored in seminal vesicles Spermatogonia (2N) mitosis Spermatocytes (2N) meiosis Spermatids (1N) Spermatozoa maturation
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21 - Insect Reproduction - Insect Reproduction Entomology...

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