Across
- 3. When ovum and sperm cells combine to form a single cell.
- 8. The second stage of prenatal development.
- 9. Traits that typically do not show in a person unless both genes for the trait are inherited.
- 12. The female germ cell.
- 16. The traits passed through the genes.
- 17. The joining of the sperm and ovum cells.
- 18. Children born in multiple births.
- 19. The first stage of prenatal development.
- 22. The male germ cell.
- 23. When the mother feels movements from the fetus.
- 26. A soft, elastic, flexible tissue that provides structure for the body.
- 27. Two hollow tubes that extend from the right and left sides of the uterus.
Down
- 1. A membrane that surrounds the baby in the uterus.
- 2. Traits that always show in a person even if only one gene of the pair is inherited for that trait.
- 4. When the fetus is seven months old, the age at which most babies could survive if they were born.
- 5. Carry genes in living cells.
- 6. The baby is called this during the fetal stage.
- 7. The development that takes place between conception and birth.
- 10. When two or more babies develop in the same pregnancy.
- 11. The organ in which the baby develops and is protected until birth.
- 13. A fluid-filled sac.
- 14. When bone cells start to replace cartilage.
- 15. Babies from an identical birth that have the same genetic makeup.
- 20. The baby is called this during the embryonic stage, looks like a small human being.
- 21. Contains three blood vessels that connect the child with the placenta.
- 24. The smallest unit of life that is able to reproduce itself.
- 25. An organ filled with blood vessels that begins to develop against the wall of the uterus.