1. A diploid somatic cell from a pigeon (Columba livia) has a total of 80 chromosomes (2n = 80).
Chickens have the ZZ-ZW chromosomal sex determination. What is the total number of chromosomes present in a single cell during prophase II of meiosis?
a. 80 ANSWER
b. 40
c. 160
d. 120
e. 20
2. In the pigeon example above, what is the total number of chromosomes present in a single cell
during metaphase of mitosis?
a. 120
b. 160
c. 40
d. 20
e. 80 ANSWER
3. ______ refers to when the phenotype of the heterozygote is intermediate to the two homozygotes.
a. Incomplete dominance ANSWER
b. Epistasis
c. Anticipation
d. Complete dominance
e. Incomplete penetrance
4. In Drosophila, an individual who is XXY and has 2 sets of autosomal chromosomes will be____.
a. male
b. metamale
c. intersex
d. female ANSWER
e. metafemale
5. What phenomenon best describes a situation when the genotype of the mother determines the
phenotype of the offspring?
a. Genotype x Environment Interaction
b. Anticipation
c. Norm of reaction
d. Epistasis
e. Genetic maternal effects ANSWER
6. If you want to determine if phenotype counts in your experiment deviate from predicted counts,
which test would you use?
a. Dihybrid cross
b. Epistasis test
c. Test cross
d. Chi-square test ANSWER
e. Complementation test
7. In ball pythons, coral glow coloration is recessive to wildtype coloration and is Z-linked. If a
wildtype female is crossed to a coral glow male, what proportion of female progeny will have the
coral glow phenotype?
a. 33%
b. 25%
c. 50%
d. 100% ANSWER
e. 0%
8. Flower color in blue-eyed Marys (Collinsia parviflora) is controlled by two genes. At the
B locus, blue flowers (B) is dominant to magenta (b). At the W locus, colored flowers (W) is
dominant to colorless (w). Plants with the genotype B-W- are blue, bbW- are magenta, and --ww
are colorless. A true-breeding plant with magenta flowers is crossed with a true-breeding plant
with white flowers, producing F1offspring with blue flowers. What is the expected phenotypic ratio for F2 progeny after selfing the F1?
a. 9:7
b. 9:3:3:1
c. 9:3:4 ANSWER
d. 12:3:1
e. 1:1:1:1
9. Two linked genes, (G) and (H), are separated by 20 cM. A man with genotype Gh/gH has
children with a woman who is gh/gh. What is the probability that their first child will be Gh/gh?
a. 0.4
b. 0.2
c. 0.1
d. 0.8
e. 0.5 ANSWER
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