Unit 6 Target 1: Meiosis
- 1.During metaphase I of meiosis, which of the following occurs?
- A.
Centromeres of replicated chromosomes line up along the cells equator.
- B.
Sister chromatids separate and move toward opposite poles of the cell.
- C.
Paired homologous chromosomes line up along the cells equator.
- D.
Homologous chromosomes separate and move toward opposite poles.
- 2.Nondisjuction can occur during which of the following phases?
- A.
Metaphase I only
- B.
Anaphase I only
- C.
Metaphase I and II only
- D.
Anaphase I and II only
- 3.A trisomy of chromosome 21 causes what condition?
- A.
Albinism
- B.
Dwarfism
- C.
Down syndrome
- D.
Color blindness
- 4.Which one of the following is the cell process that allows parents to contribute genes to their offspring?
- A.
Mitosis
- B.
Meiosis
- C.
Protein synthesis
- D.
Diffusion
- 5.Which of the following is NOT true about how meiosis reduces the number of chromosomes?
- A.
There are 2 divisions.
- B.
Homologous chromosomes pair up during Prophase I.
- C.
Anaphase I separates homologous chromosomes & Anaphase II separates sister chromatids.
- D.
Interphase (DNA replication) occurs twice.
- 6.Meiosis results in the formation of
- A.
Haploid body cells.
- B.
Haploid sex cells.
- C.
Diploid body cells.
- D.
Diploid sex cells.
- 7.If an organism's diploid number is 12, its haploid number is
- A.
12.
- B.
24.
- C.
3.
- D.
6.
- 8.Gametes have what number of chromosomes relative to the parent cell?
- A.
Two times.
- B.
One-quarter
- C.
The same
- D.
One half
- 9.Which one of the following is TRUE about the production of gametes?
- A.
Spermatogenesis results in 1 viable sperm cell and 3 polar bodies.
- B.
Male animals undergo oogenesis before birth.
- C.
Oogenesis results in 1 viable egg cell and 3 polar bodies.
- D.
All of the above are true
- 10.Meiosis results in the formation of
- A.
Two geneticall different cells.
- B.
Two genetically identical cells.
- C.
Four genetically different cells.
- D.
Four genetically identical cells.
- 11.Gametes are produced by the process of
- A.
Mitosis.
- B.
Replication.
- C.
Meiosis.
- D.
Crossing-over
- 12.Gametes have
- A.
Homologous chromosomes.
- B.
Two sets of chromosomes.
- C.
One allele for each gene.
- D.
Two the number of chromosomes.
- 13.Why does crossing over occur during Meiosis but NOT during Mitosis?
- A.
Chromatids are not involved in mitosis.
- B.
Homologous chromosomes do not pair up during mitosis.
- C.
A cell undergoing mitosis does not have homologous chromosomes.
- D.
There is no prophase during mitosis.
- 14.A female gamete produced during meiosis is called _______.
- A.
Sperm
- B.
Spermatogonium
- C.
Oogonium
- D.
Ovum
- 15.How many chromosomes are found in human gametes?
- A.
12
- B.
23
- C.
92
- D.
46
- 16.During cytokinesis in the female, what divides unequally?
- A.
The sperm cell
- B.
The ovary
- C.
The cytoplasm
- D.
The DNA
- 17.
![What is shown in the diagram? - ProProfs]( "What is shown in the diagram?")
What is shown in the diagram?- A.
Anaphase I
- B.
Gametes
- C.
Crossing-over
- D.
Replication
- 18.
![When does the process in the diagram happen? - ProProfs]( "When does the process in the diagram happen?")
When does the process in the diagram happen?- A.
Metaphase II
- B.
Prophase II
- C.
Prophase I
- D.
Metaphase I
- 19.
![Refer to the illustration, The process shown is - ProProfs]( "Refer to the illustration, The process shown is")
Refer to the illustration, The process shown is- A.
Mitosis.
- B.
Chromosomal mutation.
- C.
Meiosis.
- D.
Dominance.
.png "When does the process in the diagram happen?")
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