ANATOMY MCQs

1. The chromosomal formula of the oocyte at ovulation:

A 44 autosomes and 2 X chromosomes
B 45 autosomes and 1 X chromosome
C 22 autosomes and 1 Y chromosome
D 22 autosomes and 1 X chromosome
E 44 autosomes and 2 Y chromosomes

1. A

2. Following ovulation the ovum is viable for up to:

By 7:34 AM

A One hour
B Twenty-four hours
C Three days
D Four days
E Seven days

2. C

3. The ovum is surrounded by a non-cellular, secreted layer known as the:

By 7:34 AM

A Corona radiata
B Theca folliculi
C Zona pellucida
D Cumulus oophorus
E Stratum granulosum

3. C

4. The spermatozoon is usually viable within the female genital tract for up to:

By 7:34 AM

A One hour
B Twenty-four hours
C Forty-eight hours
D Four days
E Seven days

4. C

5. The usual number of days between fertilization and the commencement of implantation is:

By 7:33 AM

A One
B Three
C Six
D Ten
E Fourteen

5. C

6. The fertilized ovum is completely implanted in the endometrium by the end of the — day after fertilization:

By 7:33 AM

A Third
B Seventh
C Fourteenth
D Twenty-first
E Twenty-eighth

6. C

7. Fraternal twins may arise by:

By 7:33 AM

A Simultaneous fertilization of two ova
B Division of a single fertilized ovum
C Duplication of the embryoblast
D Duplication of the primitive streak
E All of the above mechanisms

7. A