How Are Genes Inherited?

1. Explain why Gregor Mendel is called the "father of genetics".

2. Distinguish between the following pairs of terms:

  • gene vs. allele
  • dominant allele vs. recessive allele
  • genotype vs. phenotype
  • homozygous vs. heterozygous

3. Make a diagram that shows a monohybrid cross between two pea plants and do the following:

  • Indicate which gene is dominant and which is recessive (you pick the trait to study).
  • Explain how the hybrid parents were produced.
  • Indicate the genotype(s) that are present in the F2 generation.
  • Indicate the ratio of phenotypes in the F2 generation.
  • Draw a Punnett square that illustrates this cross.

4. You have a pea plant that produces yellow seeds. Explain how you would use a test cross to determine its genotype.

5. Make a diagram (or Punnett square) that shows a dihybrid cross between two pea plants and explain how the cross demonstrates Mendel's law of independent assortment.

6. Be able to recognize the general features of a human pedigree.

print worksheet

download MS Word worksheet