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(B) The $Pachytene$ stage is the third stage of $Prophase-I$ in meiosis.During this stage,the bivalent chromosomes clearly appear as tetrads.It is cha

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Appearance of recombination nodules

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(B) The $Pachytene$ stage is the third stage of $Prophase-I$ in meiosis.During this stage,the bivalent chromosomes clearly appear as tetrads.It is characterized by the appearance of recombination nodules,which are the sites at which crossing over occurs between non-sister chromatids of the homologous chromosomes.Crossing over is the exchange of genetic material between two homologous chromosomes,leading to genetic recombination.

Which of the following is a characteristic of the $Pachytene$ stage?

Similar Questions

Gamete mother cells with the chromosome constitution $44+XY$ suffer from non-disjunction at the first meiotic division. Which of the following sets of gametes would result?

The diplotene phase of meiosis is also characterised by:
$a$. Desynapsis
$b$. Complete terminalisation of chiasmata
$c$. Dictyotene stage
$d$. Complete disappearance of nuclear membrane and nucleoli
$e$. Complete development of astral rays and aster
$f$. Longest phase of prophase-$I$

In the given figure,which phase is represented by the part labeled $N$?

What is the process of nuclear division called during which the chromosome number is reduced to half?

The diagram shows a bivalent at prophase-$I$ of meiosis. Which of the four chromatids can cross over?

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