Objective: Understand the Stages of Pregnancy and Development Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes  Fertilization  Cleavage  Differentiation  Growth & Development  Childbirth Embryonic Development

Fertilization  The egg is viable for 12 to 24 hours after ovulation  Sperm are viable for 12 to 48 hours after ejaculation  Sperm cells must make their way to the Fallopian tube for fertilization to be possible Objective: Understand the Stages of Pregnancy and Development Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes

zygote Fertilization Objective: Understand the Stages of Pregnancy and Development Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes Fertilization: the sperm and egg join in the fallopian tube to form a unique human being Fertilization occurs in the Fallopian Tubes Forty-six chromosomes combine. Beginning of human development

1.Label the cells as haploid (1 set of chromosomes) or diploid (2 sets of chromosomes) 2.Write the number of chromosomes of each cell. 3.What is the name of this process? 4.Complete the sentence: ____________ is the process of a _____________ joining a (an) ____________ Haploid 23 chromosomes Haploid 23 chromosomes Diploid 46 chromosomes fertilization Fertilization spermegg Fertilization Objective: Understand the Stages of Pregnancy and Development Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes

 First cell of a new individual  The result of the fusion of DNA from sperm and egg  The zygote begins rapid mitotic cell divisions  The zygote stage is in the Fallopian tube, moving toward the uterus The zygote Objective: Understand the Stages of Pregnancy and Development Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes

The zygote Identify the kind of cells represented by the numbers in the diagram Number of sets of chromosomes? Haploid or diploid? Name of the process represented by numbers Name of the process represented by numbers 3 to Sperm Egg Zygote 2 sets 1 set diploid haploid Fertilization Mitosis or Mitotic Cell Division Objective: Understand the Stages of Pregnancy and Development Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes

a)Name of the cell #1 & # 2 b)Number of chromosomes of cell #1 & #2 c)Name of the processes A & B d)Where does the process A take place? e)Where does the process B take place? f)Name of the cell # 3 g)Number of chromosomes of cell #3 46 chromosomes (2 sets) Body Cells Objective: Understand the Stages of Pregnancy and Development Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes meiosis testes ovaries sperm 23 chromosomes (1 set)

Objective: Understand the Stages of Pregnancy and Development Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes h. Name of the cell # 4 i. Number of chromosomes of cell # 4 j. Name of process C k. Where does the process C take place? l. Name of the cell # 5 m. Number of chromosomes of cell #5 n. Name of process D o. Name of the cell # 6 p. Number of chromosomes of cell # 6 Egg 23 chromosomes (1 set) fertilization Fallopian tubes 46 chromosomes (2 sets) Growth by mitosis Body cells 46 chromosomes (2 sets) Zygote

Meiosis Four Meiosis No different identical onetwo FertilizationMitosis Four only one viable Gametes for sexual reproduction Crossing over different Body Cells Zygote to develop new individual different Crossing over Objective: Understand the Stages of Pregnancy and Development Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes

Body Cell 2 sets diploidhaploid 1 set Egg diploid 2 sets Zygote diploid 2 sets Body Cell 2 sets Body Cell haploid 1 set Sperm diploid Objective: Understand the Stages of Pregnancy and Development Key Words: Fertilization, sperm, egg, zygote, Fallopian tubes