Ch 46 Pt 1 Flashcards
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