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Ninth Grade (Grade 9) Human Reproduction Questions

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Grade 9 Human Reproduction
When does conception or fertilization occur?
  1. a dominant gene overrides a recessive gene.
  2. sperm from a male unites with an egg from a female.
  3. an egg matures in a female's ovary.
  4. all 23 pairs of chromosomes are present.
Grade 9 Human Reproduction
How are blood and nutrients carried from the mother to the developing fetus?
  1. placenta
  2. fallopian tubes
  3. endometrium
  4. umbilical cord
Grade 9 Human Reproduction
What are the overall physical changes that occur in male and female bodies during puberty called?
  1. premenstrual symdrome.
  2. estrogen
  3. secondary sex characteristics
  4. testosterone
Grade 9 Human Reproduction
Grade 9 Human Reproduction
How many chromosomes do spermatogonia in humans have?
  1. 46 Chromosome
  2. 23 Chromosomes
  3. 2 Chromosomes
  4. 44 Chromosomes
Grade 9 Human Reproduction
Grade 9 Human Reproduction
A zygote is a
  1. two-celled embryo
  2. solid ball of about 50 cells
  3. blastocyst
  4. fertilized egg
Grade 9 Human Reproduction
Approximately how long does it take for childbirth occur, from fertilization to birth?
  1. Approximately nine months
  2. Three trimesters
  3. Approximately 280 days
  4. All of the above
Grade 9 Human Reproduction
What is fertilization?
  1. Joining of a sperm
  2. Joining of a sperm and egg cell
  3. Joining of an egg cell
Grade 9 Human Reproduction
Which of the following is a function of the placenta?
  1. mixing the blood of the mother and fetus
  2. protecting the fetus from any drugs or alcohol in the mother's body
  3. providing nutrients to the fetus
  4. cushioning and protecting the fetus
Grade 9 Human Reproduction
Grade 9 Human Reproduction
What is Vulva?
  1. humans, animals, or plants.
  2. the external parts of the female genital organs
  3. The period between the infection of a individual
  4. any large groups of submicroscopic agents
Grade 9 Human Reproduction
Grade 9 Human Reproduction
Identify the components of internal fertilization by numbering the correct answers in order, and ignore the incorrect answers.
  1. female lays the eggs
  2. sperm cell enters the egg
  3. the embryo develops through mitosis and cell division
  4. a zygote is formed
  5. They smoke a cigarette
  6. male deposits sperm inside the female's body
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