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BIOL 121P

Topic 5 - Reproductive and Mating Behavior

QuestionAnswer
Sexual Reproduction reproduction that involves 2 parents and the combining of egg and sperm cells
Asexual Reproduction reproduction that involves one parent and produces offspring that are genetically identical to the parent
Gametogenesis production of gametes
Mating anatomical, physiological, and behavioral adaptations to get two individuals together
Fertilization fusing of gametes
Testosterone secrets from the Leydig cells in the testes
Leydig Cell a cell in the testes that produces testosterone
Luteinizing Hormone (LH) causes leydig cell activation
Follicle-Stimulating Hormone (FSH) stimulates sperm production
Gonadotropin-Releasing Hormone controls secretion of LH and FSH
Estrogen female sex hormone that helps regulate menstrual cycle and develop female characteristics
Progesterone female sex hormone that helps regulate the menstrual cycle and prepares uterus for pregnancy
Natural Selection organisms better adapted to their environment tend to survive/produce more offspring
Sexual Selection natural selection arising through preference by one sex for certain characteristics in individuals of the other sex
Isogamy gametes of the two sexes are the same size
Anisogamy gametes are different sizes
Direct Benefits food, protection, nest sites
Indirect Benefits good genes for offspring
Sexual Dimorphism difference in appearance between sexes of the same species
Display a behavior/physical trait an animal uses to attract a mate or scare off rivals
Ornaments physical features that make an animal more attractive to mates but don't help with survival (ex: bright feathers)
Weapon a body part used to fight or compete with other animals
Sex Pheromones chemical ornaments
Monogamy one on one relationship
Polygyny one individual mates with multiple individuals of the opposite sex
Lek an aggregation of male animals gathered to engage in competitive displays
Polygamy single male mates with several females
Polyandry females mate with more than one male
Sperm Competition male-male competition
Cryptic Choice female mate choice
Created by: user-1992551
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