1. When one allele is not completely dominant

1. 1. When one allele is not completely dominant • It is called incomplete dominance and the heterozygous phenotype is blend of the dominant and recessive phenotype • The F2 generation will include ¼ dominant and ¼ recessive phenotypes c) You see inheritance patterns like those of the snapdragon flowers d) All of the above

2. 2. Which one is not a polygenic trait? • Skin color • Eye color • Pea plant flower color • All of the above

3. 3. If a diploid cell with 4 chromosomes undergoes meiosis, the result will be • Four haploid cells with 8 chromosomes • Four identical cells – each with 2 chromosomes c) Four different cells – each with two chromosomes d) Two haploid cells – each with identical DNA

4. 4. Gametes have: • Homologous chromosomes • Identical DNA to the parent cell • One allele for every gene in the original organism • Two alleles for every gene in the original organism

5. 5. Cells become haploid after which phase of meiosis? • Prophase I • Prophase II • Telophase I • Telophase II

6. 6. What do checkerboard chickens and ABO blood groups have in common? • They are both Mendelian traits • They are both inherited when mutagens alter DNA • They are both inherited as codominant traits • A & C

7. 7. If a red parrot and a yellow parrot mate and their offspring include one red, one yellow and two orange baby birds, which of the following might you assume? • That the parents were heterozygous for feather color • That their feather color is inherited as an incomplete dominant trait • A&B

8. 8. Bunny fur comes in many different colors and patterns. There are ___________________ for this trait. • Polygenic varieties • Codominant karyotypes • Multiple alleles • A&C

9. 9. Polygenic traits: • are rare • are controlled by more than one gene • are not usually beneficial • result from pairing homozygous dominant parents

10. 10. List 2 differences between mitosis and meiosis • ______________________________ • ______________________________

11. 11. List two ways in which meiosis and mitosis are similar • __________________________________ • __________________________________

12. 12. I want to produce seeds that will grow pink snapdragon flowers for Breast Cancer Awareness Month. I should select parents that are of what genotype and phenotype for breeding?

13. 13. One parent is homozygous for brown fur and the other parent is heterozygous for the same. If brown is the dominant allele and yellow is the recessive, how many puppies are likely to be yellow out of a litter of 8?

14. 14. Homologous chromosomes • Form tetrads during prophase I of meiosis • Contain the same genes, but have different alleles • Share the same alleles, but have different genes • A&B

15. 15. In pea plants, round seeds are dominant over wrinkled. One parent is wrinkled and the other parent is heterozygous. What is the predicted ratio of phenotypes for any potential offspring?

16. 16. A sex-linked trait is • one that is controlled by a gene located on the “x” or “y” chromosome • one that determines vision • impossible to detect • one that can only be carried by women