Mendel and Punnett Squares - Quiz

1. What does the word allele mean?

• An allele is a special type of gene.
• An allele is an alternative version of a gene.
• An allele is a chromosome.
• An allele means twins have the same genes.

2. Which organisms did Mendel carry out his most successful breeding experiments with?

3. What did Mendel name the "factors" that are ALWAYS expressed (shown) if passed on?

• Homozygous
• Heterozygous
• Dominant
• Recessive

4. What does homozygous mean?

• An organism has two of the same alleles.
• Two organisms are the same as each other.
• An organism has two of the same chromosomes.
• Two organisms have the same genes on a chromosome.

5. Using the Punnett Square above, what are the possible offspring genotypes? Select all that apply.

• RR
• Rr
• rr

6. How can we describe the genotype of Parent 2?

• Homozygous dominant
• Homozygous recessive
• Heterozygous dominant
• Heterozygous recessive
• Heterozygous

7. Use the information above to work out the genotype of Plant B. Then write it below, being careful of the case(s) you use for the letters, and use the letter "T" to represent the alleles.

8. Which genotypes could Plant A have? Select all that apply.

• TT
• Tt
• tt

9. If Plant A and Plant B are bred together, is it possible for their offspring to be short?

• YES
• NO

10. What name is given to the physical characteristic shown for a organism's genotype?