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Mr Camp - Topic 4

TermDefinition
differentiation stage of cleavage where cells contain the SAME DNA but develop into specialized cells with different structures and functions due to use of DIFFERENT GENES in DNA
embryo an organism in the early stages of development
estrogen female hormone, produced by the ovaries, controls female sexual development and the reproductive process. Levels in the body are regulated by the Follicle Stimulating Hormone (FSH) produced by the Pituitary gland (feedback mechanism).
fertilization process where the sperm cell (n) and egg cell (n) unite/fuse/combine/join to produce a zygote (fertilized egg)(2n)
fetus the unborn, developing young of an animal during the later stages of develeopment
gamete a.k.a. sex cell, EX; sperm & egg, involved in sexual reproduction, each gamete contains half of the complete set of DNA of the organism
gene expression when a gene(s) are "turned on" and a trait is seen ("expressed")
meiosis type of cell division that results in the formation of sex cells (gametes) with half the full number of chromosomes, contains the haploid (monoloid) (n) number of chromosomes
mitosis process of cell division where the DNA replicates and splits the DNA evenly between the two cells, each cell has the complete set of DNA
ovaries female gonad, produces female gamete (egg) through oogenesis
placenta organ that enables nutrients and oxygen to pass from mother's blood to the fetus, and waste products to pass from the fetus to the mother's blood. Blood does not mix (no direct contact of blood), diffusion of nutrients and wastes
progesterone hormone of the female that causes the uterine walls to become thick with blood in preparation for a fertilized egg. When egg is not fertilized, levels drop and cause the uterine walls to shed blood (menstruation)
sex cell includes male gamete (sperm) and female gamete (egg), contains half the genetic information of a normal body (somatic) cell, (n)(monoploid)(haploid)
species a group of organisms that share certain characteristics and can mate with one another, producing fertile offspring
testes male gonad, where the male gametes (sperm) develop, held in the scrotum which provides the optimum temperature for sperm development (2-4 degrees below body temp.), produces the male sex hormone, testosterone
testosterone male sex hormone produced in high level during puberty, stimulates the appearance of secondary sex characteristics in males, facial hair, deepening of voice, muscle development, etc
uterus organ in females, where the embryo implants and develops into a fetus
zygote cell that results from the joining, fusion, union of egg & sperm
Created by: mrcamp