Ch 46 Pt 1
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Sexual Reproduction
Fusion of haploid gametes to form diploid zygote
Asexual Reproduction
Creation of offspring without gamete fusion Offspring are identical
Types of Asexual Reproduction
Budding Fission Parthenogenesis (underutilized egg)
Reproductive Periods Semelparity
Reproduce once
Reproductive Periods Iteroparity
2 or more reproductive periods
External Fertilization
Usually aquatic - need moist environment
Internal Fertilization
Fewer gametes, more zygote survival
HPG Axis
Hypothalamus Pituitary (anterior) Gonads
Male Gonads/Tetses
Site of sperm production Makes testosterone
Epididymis
Sperm storage and final activation
Vas Deferens
Transports sperm
Accessory Glands
Add fluid to create semen
Male Gametogenesis
Spermatogonia -> Primary Spermatocyte (2n)-> Secondary Spermatocyte (n) -> early Spermatid (n)-> sperm cell (n)
1 Spermatocyte makes
4 sperm cells
What is an undifferentiated sperm cell called
Spermatid
Female Gonads/Ovaries
Egg production and maturation Makes estrogen and progesterone
Fallopian Tubes
Transport eggs Site of fertilization
Uterus
Site where fertilized egg implants to form fetus
Cervix
Very muscular
Vagina
Birth canal
Primary Ovarian Hormones
Estrogen and Progesterone (steroid) Inhibin and Activin (peptide)