Page 97 - Science Course 2 (Book 1)

Mo3-L4: Key Concept Organizer

Direction: Work with a partner to answer each question or respond to each statement on the lines provided

1. Name the type of reproduction that occurs when the genetic materials from two different cells combine to
produce an offspring.

2. What are egg cells?

3. What are sperm cells?

4. Explain the relationship between fertilization and a zygote.

5. What happens to a zygote?

6. Compare the DNA of an offspring to the DNA of its parents.

7. Why do offspring from the same parents usually have a different set of traits?

Mo3-L4: Key Concept Check

Direction: On the line before each definition, write the letter of the term that matches it correctly.
Each term is used only once.

1. production of an offspring through the combination of egg and sperm A. diploid cell
2. female sex cell B. egg
C. fertilization
3. male sex cell
D. haploid cell
4. joining of egg and sperm E. homologous

5. the cell formed by fertilization chromosomes
F. meiosis
6. body cell or zygote, which has pairs of chromosomes
G. sexual reproduction
7. male or female sex cell that has only one chromosome from each pair H. sperm
8. process by which one diploid cell divides into four haploid cells I. zygote

9. two chromosomes that have genes for the same traits in the same order

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