Biology 242 – Lecture
Chapter 29 (Development + Inheritance)
Practice Quiz
I. Circle T (True) or F (False). If the statement is false, corss out the word(s) that make it false and write in an
appropriate correction so that the statement now becomes a true statement.
T F 1. A phenotype is a chemical or other agent that causes physical defects in a developing embryo.
T F 2. Blood in the umbilical artery is normally more highly oxygenated than blood in the umbilical vein.
T F 3. Maternal blood mixes with fetal blood in the placenta.
T F 4. A morula is a stage in prenatal development in which the conceptus consists of approximately 64 cells.
T F 5. Impantation of a developing individual (blastocyst stage) usually occurs about seven hours after fertilization.
T F 6. The female sex cell does not become a fully functional haploid gamete until it has been fertilized by a
fully functional haploid male gamete.
II. Circle the letter preceding the one best answer to each question:
7. Which of the following process(es) is/are most closely associated with the fetal period of prenatal development?
(1) Rapid mitosis with no cellular growth (“Cleavage”)
(2) Differentiation
(3) Growth
A. 1 only
B. 2 only
C. 3 only
D. 1 and 2
E. 2 and 3
8. In order for the conceptus to be sufficiently developed for implantation in the uterus once it arrives there;
male and female gametes should unite in which of the following locations in the female reproductive tract?
A. Ovary
B. Infundibulum of the Fallopian Tube
C. Isthmus of the Fallopian Tube
D. Fimbria of the Fallopian Tube
E. Ampulla of the Fallopian Tube
9. Which of the following statements is correct?
A. Normal traits always dominate over abnormal traits.
B. Occasionally an error in meiosis called nondisjunction results in an abnormal number of chromonsomes.
C. The mother always determines the sex of the child because she has either an X or Y gene in her oocytes.
D. Most patterns of inheritance are simple dominant-recessive inheritances.
E. Genes are expressed normally regardless of any outside influence such as chemicals or radiation.
10. Functionally, a gene
A. may code for up to 10 different proteins (taking into account “alternative splicing” of mRNA)
B. stores hereditary information. C. may be replicated D. has two or more allelic forms E. All of these.
11. It is possible for man with blood type B+ and a woman with blood type A+ to have a child with
A. AB+ blood
B. A+ blood
C. B+ blood
D. O+ blood
E. All of these are possible
BONUS POINTS: Using a Punnett Square, show your work for how you “justify” your answer to #11: