Metaphase I

Q.

Which stage of the meiotic prophase shows terminalization of chiasmata as its distinctive feature?

1. Lepotene

2. Zygotene

3. Pachytene

4. Diakinesis

Q.

What are the 5 stages of Prophase I?

Q.

Define heterotypic division.

Q. During metaphase I, the spindle fibers attach to the _______ on the chromosomes.

1. kinetochore
2. centrosome
3. centromere
4. centrioles

Q. Match the description (given in column I) with correct stage of prophase I (given column II) and choose the correct option. Column I Column II

A) Chromosomes are moved to spindle equator	1) Pachytene
B) Centromere splits and chromatids move apart	2) Zygotene
C) Pairing between homologous chromosomes takes place	3) Anaphase
D) Crossing over between homologous chromosomes takes place	4) Metaphase

1. A-2, B-3, C-4, D-1
2. A-1, B-2, C-3, D-4
3. A-3, B-1, C-4, D-2
4. A-4, B-3, C-2, D-1

Q. What indicates ‘a’ in figure?

1. Kinetochores
2. Centrosome
3. Sister chromatids
4. Spindlepoles

Q.

Two allelic genes are located on

1. Two homologous chromosomes, each having one gene

2. Two non-homologous chromosomes

3. Any two chromosomes with one each

4. Same chromosome​

Q.

In mitosis, the number of chromosome sets in daughter cells will be ___________.

Q.

How to identify the pachytene?

Q. Which one of the following pairs is correctly matched?

1. Anaphase I - Homologous chromosomes are separated
2. Interphase - A nuclear envelope encloses each haploid set of chromosomes
3. Metaphase I - Pairing of maternal and paternal homologous chromosomes take place
4. Prophase I - Non-homologous chromosomes are separated

Q. Under which stage of meiosis does chromosome number reduce by half?

Q. D, E, F and G are the four daughter cells resulting, when cell A undergoes meiosis as shown in the following diagram. If no crossing over has occurred which cells listed below, if any, are genetically identical?

1. Cells B and C
2. Cells D and E, cells F and G
3. No two cells
4. Cells D and F, cells E and G

Q.

What happens to the sister chromatids in Anaphase I?

Q.

What happens to the homologous chromosomes in Anaphase l ?

Q.

Reorganization of genetic material occurs during

1. Metamorphosis

2. Organogenesis

3. Mitosis

4. Meiosis

Q. The number of bivalents is 8 in prophase I. What is the number of chromosomes during anaphase II?

1. $8$
2. $32$
3. $16$
4. $4$

Q. Compare between metaphase I and metaphase II of meiosis?

Q. Two chromosomes held together are chromatids each chromosome has its homologous then total 92 chromosomes must be there

Q. At which phase of meiosis, the two cells, each with separated sister chromatids move towards opposite poles?

1. Metaphase-I
2. Metaphase-II
3. Anaphase-II
4. Anaphase-I

Q.

In the case of multiple allelism, factors are present:

1. On same locus of the pair of chromosomes
2. On different loci of the same chromosome

3. On non-sister chromatids

4. On different chromosomes

Q.

Explain:

The exchange of chromatid parts between the maternal and the paternal chromatids of a pair of homologous chromosomes during meiosis.

Q. Drosophila has four homologous pairs of chromosomes. What is the number of linkage groups (homologous) in this animal?

1. Four
2. Eight
3. Uncertain
4. Two

Q. In Metaphase I, the centromeres

1. Undergo division
2. Do not divide
3. Divide but do not seperate
4. Are not similar

Q. In which stage of meiosis the structures, number and shape of chromosomes can be observed?

1. Prophase I
2. Metaphase I
3. Anaphase I
4. Telophase l

Q. At the metaphase plate during metaphase I of meiosis, there are

1. always twenty-three chromosomes
2. single chromosomes
3. unpaired duplicated chromosomes
4. bivalents

Q. In frog chromosome number is reduced to half

1. When $2$${}^{nd}$ polar body is separated
2. When $3$${}^{rd}$ polar body is separated
3. When $1$${}^{st}$ polar body is separated
4. When $2$${}^{nd}$ polar body is divided

Q.
Chiasmata are formed during meiosis

1. Before metaphase I
2. During metaphase II
3. During prophase II
4. After metaphase I

Q. Each metaphasic plate in heterotypic division of meiosis contains half the number of diploid set of chromosomes.

Q. Which among the following is a stage of meiosis during which pairs of homologous chromosomes align at the center of the cell?

1. Metaphase I
2. Anaphase II
3. Prophase II
4. Metaphase II
5. Prophase I

Q. Identify the stage when homologous chromosomes separate but sister chromatids remain associated

1. Anaphase I
2. Metaphase II
3. Metaphase I
4. Anaphase II