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University of South Florida PCB 3063 Quiz 8 1)In a healthy male, 100 primary spermatocytes will form__________________sperm

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University of South Florida

PCB 3063

Quiz 8

1)In a healthy male, 100 primary spermatocytes will form__________________sperm. 100

200

300

  400

none of the above

 

2. Which of the following statements about human oogenesis is TRUE?

 it starts at puberty

  karyokinesis is symmetrical whereas cytokinesis is not

Both A and B

      Neither A nor B

 

3. Spermatogenesis begins at conception.

at birth.

  at puberty.

at menopause.

 

4. In oogenesis, meiosis I is completed at conception

during embryonic development at birth

  at puberty

when the egg is fertilized by the sperm

 

5. Which of the following is a significant difference between spermatogenesis and oogenesis is? oogenesis involves meiosis while spermatogenesis does not

  spermatogenesis includes a period of cellular differentiation

oogenesis occurs in the testes

two of the above are significant differences

 none of the above is a significant difference

 

6. In grasshopers, sex is determined by the XX/XY chromosome system.

ZZ/ZW chromosome system.

  XX/XO chromosome system.

 

temperature during embryonic development.

 haploid/diploidy system.

 

7. The Barr body

is another term for polar body.

  is an inactivated X chromosome.

 is an inactivated Y chromosome.

 is an inactivated autosome.

is only found in humans.

 

8. The most direct precursor to a sperm is the primary spermatocyte.

secondary spermatocyte.

  spermatid. spermatogonium.

 

9. In alligators, sex is determined by the XX/XY chromosome system.

ZZ/ZW chromosome system.

XX/XO chromosome system.

  temperature during embryonic development.

 haploid/diploidy system.

 

10. Which of the following best describes the polar body? a synonym for the egg

a precursor cell that matures into the egg

  a nonfunctional cell produced at the same time as an egg

the cell produced when the sperm meets the egg

a human that lives in very cold countries

 

11. In chicken, the female is the homogametic sex.

  the heterogametic sex.

XX.

ZZ.

the male.

 

12. In chicken, sex is determined by the XX/XY chromosome system.

  ZZ/ZW chromosome system.

 XX/XO chromosome system.

temperature during embryonic development.

haploid/diploidy system.

 

 

13. In Drosophila, a fly is triploid and possesses a sex chromosome complement of XXY. This fly is male.

metamale.

  intersex.

female.

metafemale.

 

14. If three Barr bodies are observed in a mammal, the individual must possess

  four X chromosomes.

three X chromosomes.

two X chromosomes.

one X chromosomes.

 no X chromosomes.

 

15. A Drosophila melanogaster fly is found to have two copies each of chromosomes 2, 3, 4 and X in addition to two Y chromosomes. This particular fly is a(n)

male metamale

 intersex

  female

metafemale

 

16. A Barr body gets formed immediately after fertilization

  about two weeks after fertilization

 in the second month of pregnancy

 shortly after birth

at puberty

 

17. “Calico” cats are

males that are hemizygous for the X-linked coat color alleles males that are homozygous for the X-linked coat color alleles females that are hemizygous for the X-linked coat color alleles females that are homozygous for the X-linked coat color alleles

  females that are heterozygous for the X-linked coat color alleles

 

18. A calico cat mates with an orange cat. What percentage of their offspring is expected to be calico?

0%

  25%

 50%

75%

 

100%

 

19. Which of the following cells is diploid?

 primary oocyte

secondary oocyte primordial germ cell

  two of the above

 all of the above

 

20. In honeybees, the male is the homogametic sex. the heterogametic sex.

diploid.

  haploid.

 the female.