Home
Class 11
BIOLOGY
Four different steps that occur during m...

Four different steps that occur during meiosis are given in the following list.
(i) Complete separation of chromatids
(ii) Pairing of homologous chromosomes
(iii) Lining up of paired chromosomes on equator
(iv) Crossing over between chromatids
Select the correct sequential arrangement of the steps.

A

ii,iii,iv,i

B

iii,ii,iv,i

C

ii,iv,iii,i

D

iii,i,ii,iv

Text Solution

Verified by Experts

The correct Answer is:
C

Pairing of homologous chromosomes occurs in zygotene and crossing over occurs in pachytene stage of prophase I of meiosis I. Paired chromosomes line up on equator in metaphase I. Then there is complete separation of chromatids in anaphase I of meiosis I.
Promotional Banner

Similar Questions

Explore conceptually related problems

Given diagram shows a pair of homologous chromosomes during meiosis Maximum crossing over will occur between genes

Which of the following is correct about bivalent? (i) Bivalents are tetrads. (ii) A bivalent means 4 chromatids and 2 centromeres. (iii) One bivalent consists of 2 homologous chromosomes. (iv) Bivalents form in zygotene.

Different cells have different sizes. Arrange the following cells in an ascending of their size and select the correct option. (i) Mycoplasma (ii) Ostrich egg (iii) Human RBCs (iv) Bacteria

Match column I with column II and select the correct option from the given codes. {:("Column I","Column II"),("Chromosomes move to equator",(i)"Pachytene"),("Centromere splits and ",(ii)"Zygotene"),("Pairing between homologous chromosomes",(iii)"Anaphase"),("Crossing over between homologous chromosomes",(iv)"Metaphase"):}

(i) Thin thread like chromosomes with a beaded appearance (ii) Appearance of recombination nodules (iii) Formation of bivalents/tetrads (iv) Terminalisation of chiasmata (v) Appearance of chiasmata Arrange the given statements in the correct sequence of their occurrence during prophase I.

The different steps of recombinant DNA technology are given below randomly. (i) Isolation of the DNA fragments or genes to be cloned (ii) Introduction of the recombinant DNA into a suitable cell (usually E. coil) called host (transformation) (iii) Multiplication/expression of the introduced gene in the host (iv) Selection of the transformed host cells, and identification of the clone containing the desired gene/DNA fragment (v) Insertion of the isolated gene in a suitable plasmid vector Which of the following represents the correct sequences of steps ?

some important events that occur during the menstrual cycle are given below. Arrange the events in a proper sequence and select the corrrect option. (i). Proliferation of endometrial wall (ii). LH surge (iii). Secretion of estrogen (iv). Secretion of progesterone (v). Ovulation (vi). Growth of corpus luteum (vii). Degeneration of corpus luteum (viii). menstruation

Consider the following steps involved in nodule formation in the root of a legume. (i). Bacteria release chemicals and enzymes. (ii). Bacteria stop dividing and form bacteroides. (iii). Roots secrete chemical atractants. (iv). Formation of infection thread. (v). Formation of nodules. (v). Formation of nodulues. (vi). Division of infected cortical cells. (vii) Curlinig of root hair and degradation of their cell wall. (viii). Infection thread grows along with multiplication of bacteria. Arrange the steps in the right sequence and mark the correct option

Study the figure given below and answer the questions that follows (i) Pick out and name the cells that undergo spermiogenesis . (ii) Name A and B cells . What is the difference between them with reference to the number of chromosomes (iii) Pick out and name the motile cells . (iv) What is F cell ? Mention its function . (v) Name the structure of which the given diagram is a part . (vi) What is labelled as D ?

Study the given figure. (i) Pick out and name the cells that undergo spermiogenesis. (ii) Name 'A' and 'B'cells. What is the difference between them with reference to the number of chromosome? (iii) Pick out and name the motile cells. (iv) What is 'F'cell? Mention its function. (v) Name the structure of which the given diagram is a part.