Which stage of meiotic prophase shows terminalisation of chiasmata as its distincitve feature?
Dissolution of the synaptonemal complex occurs during :
Match the following with respect to meiosis:
a. Zygotene i. Terminalization
b. Pachytene ii. Chiasmata
c. Diplotene iii. Crossing over
d. Diakinesis iv. Synapsis
Select the correct option from the following:
(a) (b) (c) (d)
1. iv iii ii i
2. i ii iv iii
3. ii iv iii i
4. iii iv i ii
During Meiosis 1, in which stage synapsis takes place?
After meiosis I, the resultant daughter cells have
1. same amount of DNA as in the parent cell in S
2. twice the amount of DNA in comparison to haploid
3. same amount of DNA in comparison to haploid gamete
4. four times the amount of DNA in comparison to haploid gamete
Crossing over takes place between which chromatids and in which stage of the cell cycle?
1. Non-sister chromatids of non-homologous chromosomes at Zygotene stage of prophase I.
2. Non-sister chromatids of homologous chromosomes at Pachytene stage of prophase I.
3. Non-sister chromatids of homologous chromosomes at Zygotene stage of prophase I.
4. Non-sister chromatids of non-homologous chromosomes at Pachytene stage of prophase I.
In prophase I of Meiosis, chromosomes start pairing together and synapsis takes place. This process occurs during which of the following stage?
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): The beginning of diplotene is recognised by the dissolution of the synaptonemal complex and formation of X shaped structures called chiasmata
Reason(R): In oocytes of some vertebrates, diplotene can last for months or years. In the light of the above statements, choose the correct answer from the options given below:
1. (A) is correct but (R) is not correct
2. (A) is not correct but (R) is correct
3. Both (A) and (R) are correct and (R) is the correct explanation of (A)
4. Both (A) and (R) are correct but (R) is not the correct explanation of (A)