Practice Exam
Multiple Choice. Choose the BEST answer.
1. Observable features of an individual refer to:
a. Genotype b. Phenotype c. Dominant d. Recessive e. Gene
2. Two variants of the same gene are called:
a. Alleles b. Dominant c. Homozygous d. Heterozygous e. Isotopes
3. The principle of particulate inheritance states that:
a. Hereditary determinants maintain their integrity from generation to generation.
b. Alleles segregate into different gametes during gamete formation.
c. Alleles of different genes are transmitted independently of each other.
d. All of the above.
4. ___________ occurs when heterozygote has an intermediate phenotype.
a. Codominance b.Incomplete dominance c. dimorphism d. Polymorphism
5. Which of the following is the strongest evidence that a trait might be influenced by multiple genes?
a. F1 offspring of parents with different phenotypes show intermediate phenotype.
b. F1 offspring of parents with different phenotypes show dominant phenotype.
c. Phenotypes of the F2 offspring show qualitative (discrete) variation.
d. Phenotypes of the F2 offspring show quantitative (continuous) variation.
6. Mendel’s rules do not correctly predict patterns of inheritance for tightly linked genes or the inheritance
of alleles that show incomplete dominance or epistasis. Does that mean that his hypotheses are incorrect?
a. Yes, because they are relevant to only a small number of organisms and traits.
b. Yes, because not all data support his hypothesis.
c. No, because he was not aware of meiosis or the chromosome theory of inheritance.
d. No, it just means that his hypotheses are limited to certain conditions.
7. A Ribonucleotide consists of:
a. Phosphate group, ribose sugar, nitrogen containing base
b. Phosphate group, deoxyribose sugar, OH
c. Sodium group, deoxyribose sugar, phosphate containing base
d. Adenine, guanine, thymine, cytosine
8. What best explains the 9:3:3:1 ratio of a dihybrid cross :
a. the genes are linked b. they are polyploidy genes c. Independent Assortment d. Simple tandem
repeats (STRs)
9. In double-stranded nucleic acids, an Adenine on one strand will bind with ____ on the other strand:
a. Guanine b. Uracil c. Thymine d. Cytosine e. B or C
10. What best explains a 3:1 ratio in a cross involving two gene pairs?
a. the genes are linked b. they are polyploidy genes c. Independent Assortment d. Simple
tandem repeats (STRs)
11. DNA synthesis occurs through:
a. Semiconservative replication b. Conservative replication c. Dispersive replication
12. An individual with blood type AB is expressing: